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Science > Earth Layers > Flashcards

Earth Layers Flashcards

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1
Q

What is the inner core made of

A

solid nickel and iron

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2
Q

Is the outer core liquid or solid

A

liquid

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3
Q

What is the layer of the earth that tectonic plates move on

A

Crust

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4
Q

How do we know all of this information

A

We know this because of seismic waves.

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5
Q

The Earth’s core is about the size of

A

Pluto

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6
Q

How do we know how hot the core is.

A

Seismic waves

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7
Q

What is the Mantle made of

A

Magma

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8
Q

What is the earth’s most dense layer

A

inner core

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9
Q

What is the thinnest layer of the earth

A

crust

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10
Q

What is the crust made of

A

The crust is mostly made of granite and basalt

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11
Q

Why does the earth have different layers

A

The earth has different layers because the whole earth is made up of different matters

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12
Q

What layer plays the most important role of the movement of tectonic plates

A

Mantle

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13
Q

What is convection

A

Convection is the heat that makes rocks move up and down.

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14
Q

What is the crust made of

A

the crust is made of both Continental and oceanic crust

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15
Q

How thick is the crust

A

5-50 km thick

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16
Q

What is newer the Continental crust or the oceanic crust

A

oceanic crust is newer

17
Q

What is more dense the Continental crust of the oceanic crust

A

oceanic crust

18
Q

What is the oceanic crust made of

A

basalt rock

19
Q

Is the oceanic crust thinner or is the continental crust thinner

A

Oceanic. The oceanic crust is 5-10 km thick

20
Q

What is the oceanic crust

A

the oceanic crust is a thin layer of crust at the bottom of the ocean

21
Q

What is the continental crust

A

The Continental crust is a layer of rock that forms the continents.

22
Q

What is the continental crust made of

A

mostly granite

23
Q

What is the lithosphere

A

The lithosphere is a solid outer section of the earth, which includes the crust (rocky layer)

24
Q

What else does the lithosphere include

A

It also includes the cool dense, rigid upper part of the mantle

25
Q

What is the asthenosphere

A

The asthenosphere is a solid upper part of the mantle that is less rigid weaker like silly putty.The crust moves over it and the asthenosphere is very plasticy like. lastly in the asthenosphere theses plates move into each other.

26
Q

What is the largest layer of the earth

A

Mantle

27
Q

What is the mantle made of

A

the mantle is made of sliced rock
rich in magnesium and iron

28
Q

How much under the crust is the mantle

A

the mantle is 2890 km underneath the crust

29
Q

What happens in the mantle

A

convergent and the heat making rocks to move up and down

30
Q

What is the average temperature of the mantle

A

3000

31
Q
A

Science (3 decks)

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