1 How many layers of the Earth are there?. 2 3 3 The part of the Earth that consists of molten metal.

1

How many layers of the Earth are

there?

2

3

3

The part of the Earth that consists of

molten metal

4

Outer core

5

The depth of the deepest mine in

the world.

6

3.8 Km

7

What causes seismic waves?

8

earthquakes

9

Which metals make up the inner core?

10

Iron and nickel

11

Heat always moves …

12

From hot to cold

13

How heat is transferred in a

fluid.

14

convection

15

Causes convection

currents in the mantle.

16

Heat from the core and mantle

17

Convection currents are found in the

mantle and …

18

Outer core

19

Convection currents within are thought to

cause the Earth’s ….

20

Magnetic field

21

The part of the Earth that drifts.

22

crust

23

The trace of any organism

preserved in rock

24

fossil

25

Mountain ranges in S. America line up with ranges on …

26

Africa

27

Supercontinent name.

28

Pangaea

29

Proposed the theory of

continental drift.

30

Wegener

31

What surrounds the mantle?

32

crust

33

This boundary between the

crust and mantle is hot plastic-like

rock.

34

asthenosphere

35

Dark, fine grained igneous

rock. Mostly found on the sea

floor.

36

basalt

37

The border just above the

asthenosphere.

38

lithosphere

39

Light colored, coarse grained rock that makes up most of the

continents.

40

granite

41

Rock samples are a form of ______

evidence.

42

direct

43

Seismic waves are a form of

______ evidence.

44

indirect

45

Seismic waves revel the

structure of the Earth through

their speed and _____.

46

paths

47

Where the crust is thinnest.

48

Ocean floor

49

At what depth in the crust does the temperature start

increasing?

50

20 meters