Earth Structure Flashcards
1
Q
What is inside the earth?
A
Layers of rock
2
Q
How do we know
A
Humans have drilled 15km of the 6370km into the ground
3
Q
How else do we know
A
Seismic waves transfer energy through the crust
4
Q
What are P-waves
A
Longitudinal
Goes through solids and liquids
5
Q
What are s-waves
A
Transverse
Goes through solids only
6
Q
What does an increase in speed mean
A
Increase in density
7
Q
What are the layers of earth
A
Crust
Mantle
Outer core
Inner core
8
Q
How do the layers fit
A
Core is metal
Dense materials in centre
Light materials on top
9
Q
What is the crust divided into
A
Oceanic
Continental
10
Q
How deep is oceanic
A
8km
11
Q
How deep is continental
A
32km
12
Q
What is the temperature of crust
A
22*C
13
Q
What is the crust broken into
A
Tectonic plates
14
Q
What is the oceanic crust made of
A
Iron Oxygen Silicon Magnesium Aluminium
15
Q
What is the continental crust made of
A
Granite
Sedimentary rocks
