Geography - Hazardous Earth

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  • Created by: abby1367
  • Created on: 20-05-18 14:51
List the layers of the earth in order.
Crust (Continental/Oceanic), lithosphere, asthenosphere, mantle, outer core, inner core.
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What is the crust?
A rock layer that forms the earths surface and the upper part of the lithosphere
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What is the lithosphere?
The upper most layer of the earth, consists of the crust and upper layer of the mantle.
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What is the asthenosphere?
What is the asthenosphere? A lubricating layer under the lithosphere, so that plates can moves.
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What is the mantle?
Consists of part of the lithosphere, asthenosphere, upper and lower mantle.
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What are the differences between the outer and inner core?
OC: 2900 km deep, liquid iron and nickel. IC: 5100 km deep, solid iron and nickel.
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What is radioactive decay?
What is radioactive decay? Atoms of unstable elements (uranium, thorium) release particles from their nuclei, which gives off heat and raises the Earth's temperature to 5,000°c.
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What is geothermal?
Heat from inside the earth
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What are convection currents?
Movement within a liquid from a higher to lower temperature, which is made when heart rise from the core. It has enough force to move the crust.
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What are plumes?
What are plumes? Concentrated zones of heat where heat moves towards the surface. The mantle is less dense in a plume, so magma can break through the crust and erupt as lava through a volcano.
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What is a plate boundary?
Where two plates meet
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What is a Divergent/ Conservative plate boundary?
When two plates moves apart and forms new land, when magma rises up from the mantle to form new crust.
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What is a conservative plate boundary?
Where plates slide past each other in opposite directions, or in the same way at different speeds.
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What is a collision plate boundary?
When two continental plates collide and can only buckle upwards, to form fold mountains.
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What is a convergent/ destructive plate boundary?
When two continental plates collide and can only buckle upwards, to form fold mountains.
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Other cards in this set

Card 2

Front

What is the crust?

Back

A rock layer that forms the earths surface and the upper part of the lithosphere

Card 3

Front

What is the lithosphere?

Back

Preview of the front of card 3

Card 4

Front

What is the asthenosphere?

Back

Preview of the front of card 4

Card 5

Front

What is the mantle?

Back

Preview of the front of card 5
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