starter – folder powerpoint do starters 1 & 3 with class
TRANSCRIPT
Starter – folder
Powerpoint
Do starters 1 & 3 with class
Key Questions
How is the earth structured?
What are the differences between the earths crust?
I am going to drill down through the earth to a depth of 6000 km.
On my journey to the centre:
What do you think I would find?
Does it have a proper name?
Do you think it is the same all the
way down or does it change?
What is it made of?
Is it hot or cold?
What is its texture?
The Structure of the Earth
Outer core
Crust
Mantle
Inner core
Attach labels to the correct part of the diagram.
The Earths Crust
Continental Crust is the material which makes up all the
world’s land masses. It is old, light and
permanent. It varies in depths up to 70km
thick under mountains.
Oceanic Crust is the heavy material found
under the earths oceans and seas. It is
younger as the material is constantly being destroyed and recreated.It varies in depths of 5 to 9km.
Thin layerThickness: 6 to 70km
Made of 2 types of solid rock
Thickness: 2,900km. Temperature between 1300oC & 5000oC. molten rock is very gooey like treacle
(The proper term is Viscous)
Depth of 6,500 kmMade up of iron and nickel. Solid due to the pressure
Temperatures up to 5500oC. Thickness 2700km wide
Molten iron and nickel Liquid
Depth of 5000km Thickness: 2000km
Temperatures 2,700oC. This layer gives the earth its magnetic field.
The layers:
CRUST MANTLE OUTER CORE INNER CORE
Extension: Label Continental and Oceanic crust – write out the correct information for each
This is the land under the sea It is younger and heavier
constantly destroyed and replaced.
This is the land itself. It is older and lighter and permanent.
By the end of this lesson, you will be able to answer the following questions
Key Questions
What are tectonic plates?
What tectonic plates make up the earths crust?
Location, Location, Location
Where do volcanoes and earthquakes
occur?
Why do volcanoes and earthquakes
occur in these places?
Convention Currents
Mantle
Crust
True or False
• Volcanoes and earthquakes occur along the west coast of North and South America
• Volcanoes and earthquakes are not found in Europe
• Some places have earthquakes and not volcanoes
• Austrailia does have volcanoes and earthquakes
• There is an Indian Ring of Fire
• The mantle is solid
• Conduction currents move the plates
• Volcanoes and earthquakes occur on plate boundaries