Geography Unit 1

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  • Created by: Izzywizzy
  • Created on: 15-05-15 16:46
How do convection currents cause plate movement?
The core heats the molten rock in the mantle to create a convection current. Heated rock from the mantle then rises to the Earth's surface. At the surface the convection current moves the tectonic plates in the crust.
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What are the characteristics of oceanic crust?
Thin and dense.
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What are the characteristics of continental crust?
Thick and not as dense.
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What is a destructive plate boundary?
Where two plates are moving towards each other. When an oceanic plate meets a continental plate, the denser oceanic plate is forced down(subduction). When two continental plates meet the plates smash together but no crust is destroyed.
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What is a constructive plate boundary?
Where two plates are moving away from each other due to rising convection currents pulling the crust apart forming a volcanic ridge. New land can also be created when they are pulled apart as magma rises from the mantle and fills the gap and cools.
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Other cards in this set

Card 2

Front

What are the characteristics of oceanic crust?

Back

Thin and dense.

Card 3

Front

What are the characteristics of continental crust?

Back

Preview of the front of card 3

Card 4

Front

What is a destructive plate boundary?

Back

Preview of the front of card 4

Card 5

Front

What is a constructive plate boundary?

Back

Preview of the front of card 5

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