The core of the earth is a ball of solid (inner) and liquid (outer) iron and nickel
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What is the Mantle ?
The mantle is semi-molten rock that moves very slowly.
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What is the Crust ?
The outer layer of the earth is the crust. It's divided into slobs called tectonic plates
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What are plates made of ?
Plates are made of two types of crust - thick & less dense and thinner & more dense.
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Why do plates move ?
The plates are moving becasue of convection currents in the mantle underneath the crust. The plates where plates meet are called plate margins or plate boundaries.
Where 2 plates are moving towards each other. An oceanic plate meets a continental plate, the denser oceanic plate is forced down into the mantle and destroyed.
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What is a destructive margin ?
Two continental plates meet, the plates collide and the ground is folded and forced upwards to create mountain ranges.
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What is a constructive margin ?
Where 2 plates are moving away from each other. Magma rises from the mantle to fill the gap and cools, creating new crust.
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What is a conservative margin ?
Where 2 plates are moving sideways past each or moving in the same direction but at different speeds. Crust isn't created or destroyed.
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Other cards in this set
Card 2
Front
The mantle is semi-molten rock that moves very slowly.
Back
What is the Mantle ?
Card 3
Front
The outer layer of the earth is the crust. It's divided into slobs called tectonic plates
Back
Card 4
Front
Plates are made of two types of crust - thick & less dense and thinner & more dense.
Back
Card 5
Front
The plates are moving becasue of convection currents in the mantle underneath the crust. The plates where plates meet are called plate margins or plate boundaries.
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