Tectonic Hazards Flashcards
(8 cards)
1
Q
Inner core
A
1260km, hottest, solid, iron mixed with nickel
2
Q
Outer core
A
2220km thick, liquid, iron and nickel
3
Q
Mantle
A
Soft toffee, thickest part of the earth 2900km, denser than the crust
4
Q
Crust
A
We live on this layer, made of less dense rock so it floats on the mantle, earth’s hard skin, 8-65 km deep
5
Q
Which layers are the lithosphere?
A
The crust and upper mantle
6
Q
Oceanic crust
A
Forms on ocean floor, denser, thinner on average 7km, made of basalt
7
Q
Continental crust
A
Makes up land masses, less dense, thicker 30-50 km, mainly made of granite
8
Q
Constructive margins
A
Volcanos, gentle earthquakes
