Tectonic plates

4. waves released when plate tectonics move
5. The area around the pacific plate with lots of volcanic activity
6. normal faults occur when rocks are
9. the force causing the continents to move
10. an ocean getting smaller because of subduction the process when old sea floor goes into the mantle from trenches and gets recycled
13. a boundary where the plates come together
15. liquid in the mantle
18. a boundary where the tectonic plates move away from each other
19. are like a mountain but sometimes magma will come out

1. the process in which new ocean crust is created at mid-ocean ridges
2. is the name of the supercontinent that has over time come apart
3. the fault line under Missouri
7. Old ocean floor gets destroyed in
8. the one who first discovered the continental drift
11. The theory that the plates were once a large landmass that has moved to their current locations is known as
12. a movement of the earth-shaking
14. an ocean growing because of seafloor spreading
16. cause volcanos, mountains, and hills to form
17. a boundary where the plates rub against each other