1 how many layers of the earth are there?. 2 3 3 the part of the earth that consists of molten metal
TRANSCRIPT
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
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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
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What surrounds the mantle?
32
crust
33
This boundary between the
crust and mantle is hot plastic-like
rock.
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asthenosphere
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Dark, fine grained igneous
rock. Mostly found on the sea
floor.
36
basalt
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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.
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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