Earth Hazards Flashcards
1
Q
What is the Earths shape called?
A
A Geoid
2
Q
Which parts of the earth are flatter and wider?
A
Poles- flatter
Equator- wider
3
Q
How think is the crust?
A
0-100km
4
Q
How Hot is the crust?
A
900•
5
Q
What are the continental plates made from?
A
Sial (silica and aluminium)
6
Q
What are oceanic plates made form?
A
Sims magnesium
7
Q
What/where is the lithosphere?
A
The whole crust and the gowey part of mantel where it changes from a solid to a Liquid.
8
Q
Where/what is the asthenosphere?
A
The liquid part of mantel.
9
Q
How thick is the mantel?
A
2900km
10
Q
What is the mantel made from?
A
Peridotite
11
Q
How hot is the mantel?
A
1600
12
Q
What currents are in the mantel?
A
Convection currents
13
Q
How thick is the outer core?
A
2200km
14
Q
What is the outer core made from?
A
Iron and nickel
15
Q
How hot is the outer core?
A
4000
