The Earth Flashcards

1
Q

How much is covered by desserts

A

1/8

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2
Q

How much is covered by mountains

A

1/10

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3
Q

How much is covered by forests

A

1/4

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4
Q

What is mantle

A

Hot soft rock 4000 c. Rock is molten and known as magma

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5
Q

What is the core

A

Hot metal, mainly iron and nickle. Outer core is molten but inner core is solid due to pressure

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6
Q

Where do plates meet

A

Plate boundaries

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7
Q

What is to transform

A

When plates slide past each other

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8
Q

What is converging

A

When plates collide

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9
Q

What is diverging

A

When plates move away from each other/ divide

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10
Q

Name all the plates

A

Eurasian plate, South American plate, North American plate, Ind Australian plate Pacific plate, Nazca plate, African plate, Antartic plate

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11
Q

How much of earths surface is covered by water?

A

2/3

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12
Q

How do plates move

A

Because they are on top of convection currents, molten rock, magma

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13
Q

What is continental drift

A

When continents move with their plates

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14
Q

How do volcanic mountains form

A

Underwater when magma spills through plates drifting, can become big enough to stick out of water

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15
Q

Name three volcanic islands

A

Iceland; kraftla, Hekla, Surtsey

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16
Q

How are volcanic mountains formed

A

Plates pull apart, magma mud and ash build up into hollow cone