Structure of the earth Flashcards

1
Q

How did the moon form?

A

A large planetesimal gave earth a blow taking a chunk out of earth’s crust into space. This chunk started to orbit earth and is the moon

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2
Q

Why does the earth have seasons?

A

The moon formation knocked earth sideways changing the angle from 0-23.5 degrees.

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3
Q

Why does the earth have different layers?

A

The temperature of earth reached 2000C making the core form. Gradually the earth cooled creating the layers.

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4
Q

What are the crusts properties?

A

0-400C, ade of two types of sold rocks (oceanic and continental), 5-50 km thick

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5
Q

What are the mantles properties?

A

2900 km thick, 1400-3000C, semi molten magma/solid

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6
Q

What are the outer cores properties?

A

1300 km thick, 4000-6000C, liquid made of iron and nickle

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7
Q

What are the inner cores properties?

A

2200 km thick, 5000-6000C, solid made of iron and nickle

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8
Q

What are the four layers of earth in order?

A

crust, mantle, inner core, outer core

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