unit1 plate tectonics
TRANSCRIPT
![Page 1: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/1.jpg)
Unit 1 PLATE TECTONICS
Index
1 The Internal Structure of the Earth2 The Movement of Continents3 The theory of Plate Tectonics4 The ocean5 The Mechanisms behind Plate Tectonics
11 Earth internal layers
Types of classification
Compositional layers (depending on thecomposition)
bullCRUST
bullOceanic (10 km basalt denser)
bullContinental (70 km Si less dense)
bullMANTLE peridotite
bullCORE Fe + Ni
Physical layers (depending on the physical state)
bull LITHOSPHERE rigid
bull LOW VELOCITY ZONE (in the past ASTHENOSPHERE) ductile and partially molten
bull LOWER MANTLE or MESOSPHERE solid
bullCORE
bullOutermolten
bull Inner solid
Low velocity zone
Page 9 In pairs analyse the graph and explain your answer
Temperature increases with depth Pressure increases with depht The melting point increases
(the temperature is below the melting pointIt does not reach the melting point
As long as the temperature (green line) is below the melting point(red line) SOLID
12 Seismic discontinuities
Methods forstudying the
interior of theEarth
drilling meteoritesstudy of seismic
waves
Kola Peninsula Hole Control Centre
Types of seismic wavesP Primary waves
bullThe fastest
bull through SOLIDS and LIQUIDS
S Secondary waves
bullSlower
bullOnly through SOLIDS
R and L
bull On the surface
SEISMOGRAPH (sismoacutemetro o sismoacutegrafo) = device used for
detecting and recording seismic waves It draws a seismogram (sismograma)
seismograph seismogram
Seismic Network Operations in Toledo (Spain)
Imagine you are a scientific and obtain this graph How would you interpret thebehaviour of the seismic waves
Primary wave
= Secondary wave
The speed of waves changes very obviously in specific places
SEISMIC DISCONTINUITY = boundary between different internal layers where there isA change in the speed of the internal seismic waves
Mohorovicic discontinuity between the crust and the mantle CONTINENTS 30-40 Km depth OCEANS 10 km depth
Gutenberg discontinuity between the mantle and the core 2900 km depth
Why do S-waves dissapear here Because they cannot travel through LIQUIDS
Lehman discontinuity between outer and inner core
The speed of P-waves increases after Lehman discontinuitybecausehellip
The inner core is SOLID
Activities 1 2 and 3 page 11
Theory of continental drift (1912 Wegener)(teoriacutea de la deriva continental)
Alfred Wegener
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 2: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/2.jpg)
Index
1 The Internal Structure of the Earth2 The Movement of Continents3 The theory of Plate Tectonics4 The ocean5 The Mechanisms behind Plate Tectonics
11 Earth internal layers
Types of classification
Compositional layers (depending on thecomposition)
bullCRUST
bullOceanic (10 km basalt denser)
bullContinental (70 km Si less dense)
bullMANTLE peridotite
bullCORE Fe + Ni
Physical layers (depending on the physical state)
bull LITHOSPHERE rigid
bull LOW VELOCITY ZONE (in the past ASTHENOSPHERE) ductile and partially molten
bull LOWER MANTLE or MESOSPHERE solid
bullCORE
bullOutermolten
bull Inner solid
Low velocity zone
Page 9 In pairs analyse the graph and explain your answer
Temperature increases with depth Pressure increases with depht The melting point increases
(the temperature is below the melting pointIt does not reach the melting point
As long as the temperature (green line) is below the melting point(red line) SOLID
12 Seismic discontinuities
Methods forstudying the
interior of theEarth
drilling meteoritesstudy of seismic
waves
Kola Peninsula Hole Control Centre
Types of seismic wavesP Primary waves
bullThe fastest
bull through SOLIDS and LIQUIDS
S Secondary waves
bullSlower
bullOnly through SOLIDS
R and L
bull On the surface
SEISMOGRAPH (sismoacutemetro o sismoacutegrafo) = device used for
detecting and recording seismic waves It draws a seismogram (sismograma)
seismograph seismogram
Seismic Network Operations in Toledo (Spain)
Imagine you are a scientific and obtain this graph How would you interpret thebehaviour of the seismic waves
Primary wave
= Secondary wave
The speed of waves changes very obviously in specific places
SEISMIC DISCONTINUITY = boundary between different internal layers where there isA change in the speed of the internal seismic waves
Mohorovicic discontinuity between the crust and the mantle CONTINENTS 30-40 Km depth OCEANS 10 km depth
Gutenberg discontinuity between the mantle and the core 2900 km depth
Why do S-waves dissapear here Because they cannot travel through LIQUIDS
Lehman discontinuity between outer and inner core
The speed of P-waves increases after Lehman discontinuitybecausehellip
The inner core is SOLID
Activities 1 2 and 3 page 11
Theory of continental drift (1912 Wegener)(teoriacutea de la deriva continental)
Alfred Wegener
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 3: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/3.jpg)
11 Earth internal layers
Types of classification
Compositional layers (depending on thecomposition)
bullCRUST
bullOceanic (10 km basalt denser)
bullContinental (70 km Si less dense)
bullMANTLE peridotite
bullCORE Fe + Ni
Physical layers (depending on the physical state)
bull LITHOSPHERE rigid
bull LOW VELOCITY ZONE (in the past ASTHENOSPHERE) ductile and partially molten
bull LOWER MANTLE or MESOSPHERE solid
bullCORE
bullOutermolten
bull Inner solid
Low velocity zone
Page 9 In pairs analyse the graph and explain your answer
Temperature increases with depth Pressure increases with depht The melting point increases
(the temperature is below the melting pointIt does not reach the melting point
As long as the temperature (green line) is below the melting point(red line) SOLID
12 Seismic discontinuities
Methods forstudying the
interior of theEarth
drilling meteoritesstudy of seismic
waves
Kola Peninsula Hole Control Centre
Types of seismic wavesP Primary waves
bullThe fastest
bull through SOLIDS and LIQUIDS
S Secondary waves
bullSlower
bullOnly through SOLIDS
R and L
bull On the surface
SEISMOGRAPH (sismoacutemetro o sismoacutegrafo) = device used for
detecting and recording seismic waves It draws a seismogram (sismograma)
seismograph seismogram
Seismic Network Operations in Toledo (Spain)
Imagine you are a scientific and obtain this graph How would you interpret thebehaviour of the seismic waves
Primary wave
= Secondary wave
The speed of waves changes very obviously in specific places
SEISMIC DISCONTINUITY = boundary between different internal layers where there isA change in the speed of the internal seismic waves
Mohorovicic discontinuity between the crust and the mantle CONTINENTS 30-40 Km depth OCEANS 10 km depth
Gutenberg discontinuity between the mantle and the core 2900 km depth
Why do S-waves dissapear here Because they cannot travel through LIQUIDS
Lehman discontinuity between outer and inner core
The speed of P-waves increases after Lehman discontinuitybecausehellip
The inner core is SOLID
Activities 1 2 and 3 page 11
Theory of continental drift (1912 Wegener)(teoriacutea de la deriva continental)
Alfred Wegener
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 4: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/4.jpg)
Low velocity zone
Page 9 In pairs analyse the graph and explain your answer
Temperature increases with depth Pressure increases with depht The melting point increases
(the temperature is below the melting pointIt does not reach the melting point
As long as the temperature (green line) is below the melting point(red line) SOLID
12 Seismic discontinuities
Methods forstudying the
interior of theEarth
drilling meteoritesstudy of seismic
waves
Kola Peninsula Hole Control Centre
Types of seismic wavesP Primary waves
bullThe fastest
bull through SOLIDS and LIQUIDS
S Secondary waves
bullSlower
bullOnly through SOLIDS
R and L
bull On the surface
SEISMOGRAPH (sismoacutemetro o sismoacutegrafo) = device used for
detecting and recording seismic waves It draws a seismogram (sismograma)
seismograph seismogram
Seismic Network Operations in Toledo (Spain)
Imagine you are a scientific and obtain this graph How would you interpret thebehaviour of the seismic waves
Primary wave
= Secondary wave
The speed of waves changes very obviously in specific places
SEISMIC DISCONTINUITY = boundary between different internal layers where there isA change in the speed of the internal seismic waves
Mohorovicic discontinuity between the crust and the mantle CONTINENTS 30-40 Km depth OCEANS 10 km depth
Gutenberg discontinuity between the mantle and the core 2900 km depth
Why do S-waves dissapear here Because they cannot travel through LIQUIDS
Lehman discontinuity between outer and inner core
The speed of P-waves increases after Lehman discontinuitybecausehellip
The inner core is SOLID
Activities 1 2 and 3 page 11
Theory of continental drift (1912 Wegener)(teoriacutea de la deriva continental)
Alfred Wegener
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 5: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/5.jpg)
Page 9 In pairs analyse the graph and explain your answer
Temperature increases with depth Pressure increases with depht The melting point increases
(the temperature is below the melting pointIt does not reach the melting point
As long as the temperature (green line) is below the melting point(red line) SOLID
12 Seismic discontinuities
Methods forstudying the
interior of theEarth
drilling meteoritesstudy of seismic
waves
Kola Peninsula Hole Control Centre
Types of seismic wavesP Primary waves
bullThe fastest
bull through SOLIDS and LIQUIDS
S Secondary waves
bullSlower
bullOnly through SOLIDS
R and L
bull On the surface
SEISMOGRAPH (sismoacutemetro o sismoacutegrafo) = device used for
detecting and recording seismic waves It draws a seismogram (sismograma)
seismograph seismogram
Seismic Network Operations in Toledo (Spain)
Imagine you are a scientific and obtain this graph How would you interpret thebehaviour of the seismic waves
Primary wave
= Secondary wave
The speed of waves changes very obviously in specific places
SEISMIC DISCONTINUITY = boundary between different internal layers where there isA change in the speed of the internal seismic waves
Mohorovicic discontinuity between the crust and the mantle CONTINENTS 30-40 Km depth OCEANS 10 km depth
Gutenberg discontinuity between the mantle and the core 2900 km depth
Why do S-waves dissapear here Because they cannot travel through LIQUIDS
Lehman discontinuity between outer and inner core
The speed of P-waves increases after Lehman discontinuitybecausehellip
The inner core is SOLID
Activities 1 2 and 3 page 11
Theory of continental drift (1912 Wegener)(teoriacutea de la deriva continental)
Alfred Wegener
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 6: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/6.jpg)
12 Seismic discontinuities
Methods forstudying the
interior of theEarth
drilling meteoritesstudy of seismic
waves
Kola Peninsula Hole Control Centre
Types of seismic wavesP Primary waves
bullThe fastest
bull through SOLIDS and LIQUIDS
S Secondary waves
bullSlower
bullOnly through SOLIDS
R and L
bull On the surface
SEISMOGRAPH (sismoacutemetro o sismoacutegrafo) = device used for
detecting and recording seismic waves It draws a seismogram (sismograma)
seismograph seismogram
Seismic Network Operations in Toledo (Spain)
Imagine you are a scientific and obtain this graph How would you interpret thebehaviour of the seismic waves
Primary wave
= Secondary wave
The speed of waves changes very obviously in specific places
SEISMIC DISCONTINUITY = boundary between different internal layers where there isA change in the speed of the internal seismic waves
Mohorovicic discontinuity between the crust and the mantle CONTINENTS 30-40 Km depth OCEANS 10 km depth
Gutenberg discontinuity between the mantle and the core 2900 km depth
Why do S-waves dissapear here Because they cannot travel through LIQUIDS
Lehman discontinuity between outer and inner core
The speed of P-waves increases after Lehman discontinuitybecausehellip
The inner core is SOLID
Activities 1 2 and 3 page 11
Theory of continental drift (1912 Wegener)(teoriacutea de la deriva continental)
Alfred Wegener
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 7: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/7.jpg)
Kola Peninsula Hole Control Centre
Types of seismic wavesP Primary waves
bullThe fastest
bull through SOLIDS and LIQUIDS
S Secondary waves
bullSlower
bullOnly through SOLIDS
R and L
bull On the surface
SEISMOGRAPH (sismoacutemetro o sismoacutegrafo) = device used for
detecting and recording seismic waves It draws a seismogram (sismograma)
seismograph seismogram
Seismic Network Operations in Toledo (Spain)
Imagine you are a scientific and obtain this graph How would you interpret thebehaviour of the seismic waves
Primary wave
= Secondary wave
The speed of waves changes very obviously in specific places
SEISMIC DISCONTINUITY = boundary between different internal layers where there isA change in the speed of the internal seismic waves
Mohorovicic discontinuity between the crust and the mantle CONTINENTS 30-40 Km depth OCEANS 10 km depth
Gutenberg discontinuity between the mantle and the core 2900 km depth
Why do S-waves dissapear here Because they cannot travel through LIQUIDS
Lehman discontinuity between outer and inner core
The speed of P-waves increases after Lehman discontinuitybecausehellip
The inner core is SOLID
Activities 1 2 and 3 page 11
Theory of continental drift (1912 Wegener)(teoriacutea de la deriva continental)
Alfred Wegener
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 8: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/8.jpg)
Types of seismic wavesP Primary waves
bullThe fastest
bull through SOLIDS and LIQUIDS
S Secondary waves
bullSlower
bullOnly through SOLIDS
R and L
bull On the surface
SEISMOGRAPH (sismoacutemetro o sismoacutegrafo) = device used for
detecting and recording seismic waves It draws a seismogram (sismograma)
seismograph seismogram
Seismic Network Operations in Toledo (Spain)
Imagine you are a scientific and obtain this graph How would you interpret thebehaviour of the seismic waves
Primary wave
= Secondary wave
The speed of waves changes very obviously in specific places
SEISMIC DISCONTINUITY = boundary between different internal layers where there isA change in the speed of the internal seismic waves
Mohorovicic discontinuity between the crust and the mantle CONTINENTS 30-40 Km depth OCEANS 10 km depth
Gutenberg discontinuity between the mantle and the core 2900 km depth
Why do S-waves dissapear here Because they cannot travel through LIQUIDS
Lehman discontinuity between outer and inner core
The speed of P-waves increases after Lehman discontinuitybecausehellip
The inner core is SOLID
Activities 1 2 and 3 page 11
Theory of continental drift (1912 Wegener)(teoriacutea de la deriva continental)
Alfred Wegener
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 9: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/9.jpg)
SEISMOGRAPH (sismoacutemetro o sismoacutegrafo) = device used for
detecting and recording seismic waves It draws a seismogram (sismograma)
seismograph seismogram
Seismic Network Operations in Toledo (Spain)
Imagine you are a scientific and obtain this graph How would you interpret thebehaviour of the seismic waves
Primary wave
= Secondary wave
The speed of waves changes very obviously in specific places
SEISMIC DISCONTINUITY = boundary between different internal layers where there isA change in the speed of the internal seismic waves
Mohorovicic discontinuity between the crust and the mantle CONTINENTS 30-40 Km depth OCEANS 10 km depth
Gutenberg discontinuity between the mantle and the core 2900 km depth
Why do S-waves dissapear here Because they cannot travel through LIQUIDS
Lehman discontinuity between outer and inner core
The speed of P-waves increases after Lehman discontinuitybecausehellip
The inner core is SOLID
Activities 1 2 and 3 page 11
Theory of continental drift (1912 Wegener)(teoriacutea de la deriva continental)
Alfred Wegener
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 10: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/10.jpg)
Seismic Network Operations in Toledo (Spain)
Imagine you are a scientific and obtain this graph How would you interpret thebehaviour of the seismic waves
Primary wave
= Secondary wave
The speed of waves changes very obviously in specific places
SEISMIC DISCONTINUITY = boundary between different internal layers where there isA change in the speed of the internal seismic waves
Mohorovicic discontinuity between the crust and the mantle CONTINENTS 30-40 Km depth OCEANS 10 km depth
Gutenberg discontinuity between the mantle and the core 2900 km depth
Why do S-waves dissapear here Because they cannot travel through LIQUIDS
Lehman discontinuity between outer and inner core
The speed of P-waves increases after Lehman discontinuitybecausehellip
The inner core is SOLID
Activities 1 2 and 3 page 11
Theory of continental drift (1912 Wegener)(teoriacutea de la deriva continental)
Alfred Wegener
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 11: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/11.jpg)
Imagine you are a scientific and obtain this graph How would you interpret thebehaviour of the seismic waves
Primary wave
= Secondary wave
The speed of waves changes very obviously in specific places
SEISMIC DISCONTINUITY = boundary between different internal layers where there isA change in the speed of the internal seismic waves
Mohorovicic discontinuity between the crust and the mantle CONTINENTS 30-40 Km depth OCEANS 10 km depth
Gutenberg discontinuity between the mantle and the core 2900 km depth
Why do S-waves dissapear here Because they cannot travel through LIQUIDS
Lehman discontinuity between outer and inner core
The speed of P-waves increases after Lehman discontinuitybecausehellip
The inner core is SOLID
Activities 1 2 and 3 page 11
Theory of continental drift (1912 Wegener)(teoriacutea de la deriva continental)
Alfred Wegener
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 12: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/12.jpg)
The speed of waves changes very obviously in specific places
SEISMIC DISCONTINUITY = boundary between different internal layers where there isA change in the speed of the internal seismic waves
Mohorovicic discontinuity between the crust and the mantle CONTINENTS 30-40 Km depth OCEANS 10 km depth
Gutenberg discontinuity between the mantle and the core 2900 km depth
Why do S-waves dissapear here Because they cannot travel through LIQUIDS
Lehman discontinuity between outer and inner core
The speed of P-waves increases after Lehman discontinuitybecausehellip
The inner core is SOLID
Activities 1 2 and 3 page 11
Theory of continental drift (1912 Wegener)(teoriacutea de la deriva continental)
Alfred Wegener
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 13: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/13.jpg)
Theory of continental drift (1912 Wegener)(teoriacutea de la deriva continental)
Alfred Wegener
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 14: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/14.jpg)
200 million years ago all the continents were joinedtogether as one called PANGEA
Continents have separated sliding over a continouslayer
Theory of continental drift (1912 Wegener)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 15: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/15.jpg)
ldquo650millionYearsIn80secondsrdquo videohttpwwwyoutubecomwatchv=VrBPB1dHYawampfeature=related
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 16: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/16.jpg)
Evidence of thetheory of
Continental Drift
Paleolithicevidence identicalfossils in continents
far apart
Biologicalevidence identical
or similar living beings in continents
far apart
Geological evidence continents fit togetheralong their coastlinesand have similar rocks
Paleoclimaticevidence glaciar
rests appear in places where now
the climate iswarmer
Paleolithic evidence
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 17: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/17.jpg)
Rhea (South America)
Ostrich (Africa)
Emu(Australia)
Biological evidence
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 18: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/18.jpg)
Geological evidence
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 19: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/19.jpg)
Paleoclimatic evidence
Activities 7 and 8 page 11
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 20: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/20.jpg)
31 Seismic and volcanic belts
Earthquakes and volcanoes are located in narrow bands called seismic belts Theycoincide with the plate boundaries
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 21: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/21.jpg)
32 Lithospheric plates
Lithospheric or tectonic plates are fragments of the lithosphere
Types
Oceanic Nazca Plate
Continental Arabian Plate
Mixed African Plate
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 22: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/22.jpg)
33 Types of plate boundaries
Divergent boundaries (constructive) New ocean lithosphere is created
Pillow lavas
httpwwwjuntadeandaluciaesaverroesmanualestectonica_animadatect_swf_files01[1]swf
Volcanoes + earthquakes
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 23: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/23.jpg)
Convergent boundaries (destructive)
A) Two OCEANIC PLATES collide
Volcanoes + earthquakes
One of the plates slides down the other (subduction) forming an oceanic trench and an arch of volcanicislands
Example Japan
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 24: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/24.jpg)
Mariana Islandsand Mariana Trench
The Pacific Plate subducts forming the Mariana Islands and Philippines
Japan
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 25: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/25.jpg)
B) One CONTINENTAL and one OCEANIC PLATE collide
Volcanoes + earthquakes
The oceanic plate which is denser subducts underthe continental plate forming an oceanic trench and a mountain range
Example Andes
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 26: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/26.jpg)
B) TWO CONTINENTAL PLATES collide
Earthquakes
None of the plates subducts A mountain range is formed
Ex Himalayas Pirenees
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 27: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/27.jpg)
Transform boundaries (passive)
Two plates slide horizontally against each other These fractures
are called transform faults (fallas transformantes)
Earthquakes
Example San Andreas Fault in California
Pacific PlateNorthamerican Plate
httpswwwyoutubecomwatchv=OjMhUGsF_Nw
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 28: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/28.jpg)
BENIOFF ZONE = area of seismic activity in a subducting plate
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 29: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/29.jpg)
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Complete
Type of boundary
Type of movement
Ocean floor Landformproduced
Activityproduced
Divergent Separation Creates Oceanic ridges Earthquakesand volcanoes
Convergent Collision Destroys Trenches island archs volcanicmountains
Earthquakesand volcanoes(except continental collision)
Transform Lateral None transformfaults
ONLY earthquakes
Activity 5 page 22
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 30: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/30.jpg)
The lithosphere is divided into blocks called plates
Most of the internal geological activityhappens at their boundaries
Ocean floor is
generated along the ridges new oceansare created
destroyed by subduction in the trenchesmountain ranges are lifted up
Activities 13 16 page 17
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 31: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/31.jpg)
41 The ocean floor
Landforms
Mid-ocean ridge volcanic mountainrange under water
Trenches narrow deep channels They appear as a consequence of
subduction
Rift = central channel
Faults = perpendicularfractures which crossthe ridge
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 32: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/32.jpg)
Composition of the ocean floor
Volcanic rocks (basalt) covered in marine sediment No older than 180 million years
(submerged)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 33: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/33.jpg)
age age
basalt
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 34: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/34.jpg)
42 Sea floor spreading
Magma rises up from the mantle at the oceanic ridges
This magma pushesout the older lava
deposits
We can findsymmetrical bands
of ocean floor(different ages)
parallel to the axis of the ridge
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 35: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/35.jpg)
The ocean floorspreads and
extends
oceanic lithosphereis formed at the
ridges
oceanic lithosphereis destroyed at the
trenches
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 36: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/36.jpg)
51 Wilson cycle
A Rift Valley Stage
Magma rises up through fractures making the lithospherethinner and lower
(Drawing 1 and 2 book)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 37: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/37.jpg)
B Red Sea Stage
Deep lakes are formed at the bottom of the valleywhich spreads and spreads
(Drawing 3 book)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 38: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/38.jpg)
C Atlantic Ocean Stage
New oceanic lithosphere is beingproduced aund the Atlantic Oceanis expanding
(Drawing 4 book)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 39: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/39.jpg)
D Pacific Ocean Stage
The oceanic lithosphere becomes olderand denser Subduction zones appear
where the lithosphere is destroyedThe Pacific Ocean is getting smaller
(Drawing 5 and 6 book)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 40: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/40.jpg)
E Indian Continent Stage
The ocean closes as the continents converge Marine sediments are trapped and continentalmasses join together A mountain range is formed
(Drawing 7 and 8 book)
Activities 20 21 23 and 24 page 21
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 41: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/41.jpg)
52 How plates move
Convection currents inside the mantle`push the plates
Hot currents not only rise up throughthe ridge but also through hot spots(puntos calientes)
Gravity pulls down on both sides of the lithosphere
The sinking plate pulls down (slab pull)
Slab pull force occurs when a denser oceanic plate is forced beneatha less dense continental plate or oceanic plate in a process called subduction
httpswwwyoutubecomwatchv=8LBjaoQe3EEWilson Cycle video
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 42: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/42.jpg)
Hot spots
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video
![Page 43: Unit1 Plate Tectonics](https://reader030.vdocuments.us/reader030/viewer/2022032615/55a31f871a28abfa308b4755/html5/thumbnails/43.jpg)
Read page 20 53
Development of basic competences 1 2 3 and 4
seismic discontinuity continental drift seismic belt hypocentre seismograph
Review Continental Drift Video