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Year 8 Geography > Plate Tectonics > Flashcards

Plate Tectonics Flashcards

1
Q

How thick is the crust?

A

8.65 KM thick

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2
Q

What is the crust?

A

The outer layer of the earth that you live on. It’s a thin layer of rock.

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3
Q

What is the mantle?

A

It forms about half of the earth and is made of heavy rock. But below the rock is hot and soft like plastic, it’s liquid in some places

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4
Q

What is the upper mantle made of?

A

Hard rock

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5
Q

What is the lower part of the mantle made of?

A

Soft rock

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6
Q

What is the outer core made from?

A

Liquid which is iron and nickel

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7
Q

What is the inner core made from?

A

It’s solid a And iron and nickel

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8
Q

How many layers is earth made of?

A

4

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9
Q

What are plates?

A

The outer layers broken pieces

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10
Q

What crust is the main land?

A

The continental

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11
Q

How thick is the continental crust?

A

35 KM

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12
Q

What is the ocean floor made of?

A

The oceanic crust

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13
Q

What is thinner the continental crust or the oceanic crust?

A

The oceanic crust

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14
Q

What is the oceanic crust covered in?

A

A thin layer of ocean sediments

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15
Q

How thick is the oceanic crust?

A

5 KM

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16
Q

Where does the magma which feeds volcanoes come from?

A

The mantle

17
Q

What is the hottest part of earth?

A

The core

18
Q

How hot is the mantle?

A

1600*c

19
Q

What is the upper mantle often described as?

A

Bendy plastic

20
Q

How hot is the upper part of the mantle?

A

600-800*c

21
Q

How thick is the mantle?

A

2800KM thick

22
Q

How thick is the outer core?

A

2100KM thick

23
Q

How hot is the outer core?

A

3000*c

24
Q

How thick is the solid inner core?

A

1300KM thick

25
Q

How hot is the inner core?

A

5000*c

26
Q

What is the core?

A

Mainly iron, mixed with a bit of nickel. The outer core is liquid the inner core is solid

27
Q

Where do earthquakes and volcanoes occur?

A

On or near plate boundaries

28
Q

What are the 3 different plate boundaries?

A

Convergent
Divergent
Conservation

29
Q

What is a divergent plate boundary?

A

When 2 plates have been pulled apart. This is how volcanoes and earthquakes happen

30
Q

How many types of convergent plate boundaries are there?

A

2

31
Q

What is one type of convergent plate boundaries?

A

When two plate boundaries (oceanic and continental) crash together and cause earthquakes and or volcanoes

32
Q

What is the other type of convergent

A

When two plates meet and cause earthquakes and or volcanoes but they also make mountains

Year 8 Geography (2 decks)

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