Moving Tectonic Plates Flashcards
0
Q
what is the crust made from?
A
thin layers of tectonic plates
1
Q
what are the four layers of the earth?
A
Inner core
Outer core
Mantle
Crust
2
Q
what is the mantle made up of?
A
silos uppers part and semi liquid lower part which can flow
3
Q
what does the core consists of?
A
Liquid outer core and solid inner core
4
Q
How do convention currents cause plate movement?
A
- Core heats molten rock in the mantle to create a convection current.
- Heated rock from the mantle rises to earths surface
- At the surface the convection current moves the tectonic plate in the crust
- Molten rock cools and flows back
5
Q
Describe the differences between oceanic and continental crust
A
Continental crust is thicker but less dense than the oceanic crust