Chapter 10 - Moving Continents Flashcards
1
Q
How many layers are there in the Earth?
A
5
2
Q
Crust
A
The outer layer, 5km to 30km. AKA lithosphere rigid rock.
3
Q
Upper mantle and lower mantle
A
Upper is rigid and tpp bit is called lithosphere, and bottom part is called the asthenosphere. Lower is semiliquid
4
Q
Outer and Inner Core
A
Outer is made of liquid nickel and iron. The inner is made of iron, and is solid and rigid.
5
Q
Convection Currents
A
Hot magma rises from the asthenosphere, hitting the plates and pushing them before cooling sinking into the asthenosphere.
6
Q
How gravity moves plates
A
Slab Pull: gravity pulls on heavier oceanic crust near trenches, pulling the plate into the mantle.
Ridge push: new crust formed by magma at the ridge and pushes the older crust away.
