What are the components of the earth, from outside to inside?
Crust, Mantle, Outer Core, Inner Core
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What are the properties of the crust?
Relatively thin and rocky
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What are the properties of the mantle?
Has properties of a solid, but can flow very slowly
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What is the core made of?
Liquid Nickel and iron
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What surrounds the earth?
The earth's atmosphere
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Why do the tectonic plates move apart?
Because of convection currents in the mantle, driven by heat. The only move a few cm yearly
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What is the process of the tectonic plates moving apart called?
Continental Drift
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What happens when the crust crumples?
It forms mountain ranges
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What is Wegner's theory?
That all the continents were once joined together, to form one big continent called Pangea. He believes that it has drifted apart over time due to continental drift.
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What are the 2 main types of tectonic plates?
Oceanic plates: That form under oceans; and Continental Plates, that form the land/
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