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GCSE Plate margins
A set to help you revise the Restless Earth topic
Terms in this set (17)
The PROCESS when one plate is pushed underneath another plate
Destructive plate margin
Where 2 plates collide and one plate sinks under another, destroying the oceanic crust
Constructive Plate margin
Where the two plates move apart making new crust
Conservative plate margin
Where 2 plates slide alongside each other at different speeds, stick slip occurs which causes earthquakes
The outer, solid layer of the Earth
The layer of the earth between the crust and the core, molten in parts
The movement of magma in the mantle caused by heating of the material
A dense sphere of solid iron and nickel at the center of Earth
Where the two plates meet
Granitic part of the Earth's crust that makes up the continents. Continental crust is also called sial because it consists largely of silica and aluminum and averages about 40km thick
Thin, more dense than continental crust, subducting crust
These are mountains formed as the plates move together and folds are formed as the the layers are squeezed horizontally.
Deep valley in the ocean floor that forms along a subduction zone
Created at a divergent boundary where the ocean plates spread apart. Magma rises out to form underwater mountains.
Tall, cone-shaped volcano in which layers of lava alternate with layers of ash
A wide gentle sloping volcano made of layers of lava and formed by quiet eruptions.
Pacific ring of fire
Zone of crustal instability, volcanism, and earthquakes in the Pacific region.
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