Tectonic plates Flashcards

1
Q

What is the Earth’s surface separated into?

A

Tectonic plates

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2
Q

What is around the core?

A

Mantle

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3
Q

Does the mantle move fast or slow?

A

Very slow

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4
Q

What is the mantle made out of?

A

Semi-molten rock

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5
Q

What is the outer layer called?

A

The crust

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6
Q

Is the crust thick or thin?

A

Thin

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7
Q

What are the two types of crust?

A

Continental and oceanic

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8
Q

What are the two features of continental crust?

A

Thicker, less dense

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9
Q

What are the two features of oceanic crust?

A

Thinner, more dense

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10
Q

Why are the plates moving?

A

The rock in the mantle underneath the plates is moving

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11
Q

What are the place the plates meet called?

A

Boundaries or plate margins

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12
Q

What are the three types of plate margins?

A

Destructive, constructive and conservative

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13
Q

What are the two plates doing in a destructive margin?

A

Oceanic and continental are moving towards each other

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14
Q

What happens in a destructive plate margin?

A

The oceanic plate is more dense so it is forced down into the mantle and destroyed

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15
Q

What does the destructive margins create?

A

Volcanoes and ocean trenches

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16
Q

What does the plates in a constructive margin do?

A

Both plates are moving away from each other and magma rises to fill the gap

17
Q

What does a constructive margin create?

A

Because the magma cools down when it fills the gap it creates a new crust

18
Q

What do the plates in a conservative margin do?

A

The two plates are moving sideways past each other or moving in the same direction but at different speeds

19
Q

What does the conservative margin create?

A

Nothing. Crust isn’t created or destroyed