structure, plate movement and boundaries Flashcards
1
Q
what are the 4 layers of the earth?
A
crust, mantle, outer core, inner core
2
Q
what causes plate movement
A
convection current
3
Q
How does convection current work
A
The rock in the mantle heats up and rises. It ends up just below the crust and spreads out carrying the above crust with it. It then cools and sinks back down to the bottom of the mantle.
4
Q
The crust is split into 2 types. What are they?
A
oceanic and continental
5
Q
What are the 4 plate boundary types
A
constructive, destructive, collision and conservitive
6
Q
what are the 7 biggest tectonic plates
A
pacific, north american, eurasian, african, antarctic, indo-australian and south american
