Structure of the Earth Flashcards by Oliver Lorenschitz-Arneil | Brainscape

Q

What is the thinnest layer of the Earth?

A

The Crust

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Q

How thick is the crust?

A

5-70 km

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Q

What is the coldest layer?

A

The Crust

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Q

What is the crust broken into?

A

Tectonic Plates

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Q

What material is the crust made out of?

A

Mainly basalt under the oceans

Mainly granite under the continents

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Q

What is the thickest layer of the Earth?

A

The Mantle

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Q

How does the mantle move?

A

Convection Currents

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Q

How hot can the mantle get?

A

1000°C near the crust

3700°C near the core

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Q

What material is the mantle made out of?

A

Semi-molten rock (semi-liquid rock)

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Q

What material is the outer core made out of?

A

Semi-liquid iron

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Q

How hot can the outer core get?

A

Between 3700°C - 5000°C

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Q

How thick is the outer core?

A

2300 km

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Q

Where the is the world’s magnetic field formed?

A

The Outer Core (As it contains iron)

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Q

What is the inner most part of the Earth?

A

Inner Core

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Q

How thick is the inner core?

A

1250 km

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Q

What is the hottest part of the Earth?

A

The Inner Core

Q

How hot can the inner core get?

A

More than 5000°C (5000°C+)

Q

What material is the inner core made out of?

A

Iron and nickel

Q

What layer of the Earth is very dense?

A

The Inner Core; under lots of pressure (4 times more pressure than at the crust)

Q

In which layer is the rock solid?

A

Inner core; as a result of the pressure