Geography

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  • Created by: Katie_
  • Created on: 16-02-14 15:39
Oceanice Crust
Under the ocean is oceanic crust. This is much thinner, usually 6-8km thick. It is denser and made of an igneous rock called basalt.
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Continental Crust
Forms the land. Mostly made up of granite. It is on average 30-50km thick.
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Mantle
The astherosphere is in the top layer of the mantle. It is mostly solid rock.
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Core
The outer core is liquid, it is also dense and metallic. The inner core is a solid, it contains radioactive material and generates heat.
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Lithosphere
The uppermost layer of the Earth. It is cool and brittle.
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Asthenosphere
In the top layer of the mantle. The tectonic plates move very slowly on this layer.
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Convection currents
Bring magma up from the mantle.
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Magnetosphere
Earth is surrounded by a huge invisible magnetic field. This is a force field. It protects the Earth from harmful radiation from space and the sun.
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Conservative plate boundary
Formed when two plates slide past each other.
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Constructive plate boundary
Formed when two plates move apart.
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Destructive plate boundary
Formed when two plates collide and oceanic crust is sub ducted under continental crust.
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Collision plate boundary
When two continental plates meet and fold up to create mountains.
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Focus
The point in the crust where the Earthquake originates.
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Epicentre
Point directly above focus on the surface of the crust.
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Seismic waves
The waves of energy released by the plates which form the earthquake.
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Other cards in this set

Card 2

Front

Forms the land. Mostly made up of granite. It is on average 30-50km thick.

Back

Continental Crust

Card 3

Front

The astherosphere is in the top layer of the mantle. It is mostly solid rock.

Back

Preview of the back of card 3

Card 4

Front

The outer core is liquid, it is also dense and metallic. The inner core is a solid, it contains radioactive material and generates heat.

Back

Preview of the back of card 4

Card 5

Front

The uppermost layer of the Earth. It is cool and brittle.

Back

Preview of the back of card 5
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