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Landforms in Geography • Geography is the
study of both people and the lands that they live in.
• An important part of studying the land is learning about landforms and understanding how the land was created and how it affects people
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Got Vocab?• Landforms:
(n.) The shapes of land on Earth’s surface. Two examples of landforms are rivers and mountains.
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Notes
• Your notes on how landforms are formed will include:
–A definition–A picture–An example
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Plate Tectonics• The Earth’s crust is divided
into 7 major plates that float and move on top of liquid rock.
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Plate Tectonics
• Pangaea is an example of plate tectonics. According to this theory the Earth had only one land mass that slowly began to pull apart.
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Divergent Plate Boundary
• Occurs when two plates are moving apart from each
other • Can occur on land
or under water.
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Mid Oceanic Ridge • The Mid Oceanic Ridge is an example of a divergent plate boundary. It is an area where plates pull apart and magma rises to create
new crust.
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Convergent Plate Boundary
• Happens when two heavy continental plates collide and create mountains
• The Himalaya Mts. are an example of what happens when two plates collide.
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Himalayan Mountain Range
• Created when the Indian Plate crashed into the Eurasian Plate
• Is an example of a convergent plate boundary
• Mt. Everest in the Himalayas continues to grow 1 cm per year
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Subduction Plate Boundary• Happens when a
heavier ocean plate moves underneath a lighter continental plate
• The diving plate melts in the Earth’s mantle and becomes magma.
• Magma then rises through the Earth’s crust and erupts as lava
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Cascade Mountain RangeWhen an oceanic plate slid under a
continental plate, magma rose and created volcanic eruptions which created mountain ranges like the Cascades. It is a
good example of subduction plate boundaries.
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Transform Boundary
• Occur when plates slide past one another in the opposite direction.
• Plate edges often become stuck and pressure builds.
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San Andreas Fault• The San Andreas Fault is an example
of a transform boundary. It is responsible for many earthquakes in
California.
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1906 San Francisco Quake• Happened when
the San Andreas Fault moved 22 ft.
• The earthquake and resulting three day fire are responsible for destroying the city and killing an estimated 700 people.
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Weathering
• The process of breaking down landforms to create new ones.
• Large pieces of rock are broken down into smaller pieces
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Ways to Break a Rock• HEAT can cause rocks
to become so hot that they crack
• WIND can slowly carve away at rocks
• These are both examples of weathering.
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Ways to Break a Rock• Water seeps into rock
cracks, expands when frozen, and pries rocks apart.
• As water moves it cuts into rock and creates valleys
• These are two more examples of weathering.
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Ways to Break a Rock
• CHEMICALS slowly eat away at rocks until they break
• Another example of weathering
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Ways to Break a Rock
• All of this is possible because of TIME
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The Power of Weathering
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Erosion
• Once the rock is broken, it is moved away by water, ice, or wind and settles to create new landforms.
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Erosion
• Water and ice is usually responsible for carrying rocking material/ sediment away and depositing it somewhere else
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Landforms Created by Water and Ice Erosion
Alluvial Fan
Delta
Plain
7Examples of Erosion
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Landform Created by Wind Erosion
Dune
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Plate Tectonics Aerobics
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Subduction Boundary
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Transform Boundary
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Divergent Boundary
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Convergent Boundary
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Round Robin Vocabulary
Each student will have two minutes to write the definition and draw a picture for each term on their vocabulary sheet.Word
Mountain
Definition and Example
A land mass that projects above
surrounding landforms and is above 2,000 ft.
Illustration
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Passing Vocab. Panels
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I Have You Have Landforms!
1. Each student will receive their own vocab card
2. The game begins with the teacher reading a term’s definition.
3. Students look at their cards to see if they have the term that matches the definition.
4. The student who has the term then reads the new definition on their card aloud.
I Have…
Desert
Who has…
An area in the desert with a water source.
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Landform
Bingo!
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BINGO! Match the bingo definitions with these terms.
ArchipelagoDelta Isthmus Plain
Atoll Desert Lake River
Basin Dune Mountain Strait
Bay Fjord Oasis Valley
Canyon Glacier Ocean Volcano
Coast Gulf Peninsula
Coral Reef Island