earth structure1
DESCRIPTION
Introduction to KS4 GCSE Tectonic ActivityTRANSCRIPT
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75 km thick
8 km thick
Granite
light
Basalt
heavyMANTLE
SEA
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A
B
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http://www.mpm.edu/reef/pt-gif.html
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Convection Currents
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Structure of the Earth and Plate Boundaries
1. Draw a labeled diagram to show the structure of the Earth.
2. What is a Plate?(avoid the dinner joke)
3. What are the differences between continental crust and oceanic crust?
4. What is a convection current?
5. Add the main plate names to your map and arrows showing the direction of plate
movement.
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The Earth is divided into 3 Parts
These are:-
CORE
MANTLE
CRUST
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The MANTLE is…….
Very hot @ 1200 C
Very thick @2900 km
Under great pressure
It moves!!!!!!!! Due to CONVECTION CURRENTS
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The CRUST is …….
Thin in places 8km thick
Thick in places 75 km thick
Oceanic Crust
(heavy)
Continental Crust
(light)
BASALT
GRANITE
All crust is broken up into large plates(TECTONIC PLATES)
These Plates MOVE!!!!