Structure of the Earth Flashcards
1
Q
What are the 4 main layers the Earth is made up of?
A
- the crust (lithosphere) solid, thin (~30km) - the mantle semi-liquid (~3000km) - outer core liquid (~2000km) - inner core solid (~1000km)
2
Q
Draw a diagram of the structure of the Earth
A
[insert drawing]
3
Q
What are convection currents?
A
Convection currents transfer heat from one place to another.
As the gooey magma in the mantle is heated, it rises and cools near the surface, and then drops.
5
Q
What are the types of plate boundaries?
A
- Divergent plate boundary [plates moving away from each other] oceanic spreading ridge continental rift zone - Convergent plate boundary [plates colliding against each other] oceanic-oceanic convergence continental-continental convergence continental-oceanic convergence - Transform plate boundary [plates slide past each other]
6
Q
What are tectonic plates?
A
Tectonic plates are smaller pieces of crust that float on the mantle.
Convection currents in the mantle cause the plates to move.
