Plate Tectonics

2. The top or outer layer of the Earth
8. When one plate is pushed beneath another
10. Plate boundary that forms a ridge
12. The dividing line where two plates meet
13. A large mountain with explosive capabilities formed at a convergent boundary
16. The point on the Earth's surface directly above an earthquake
17. A natural disaster common near transform boundaries and caused by quick motions of tectonic plates.
18. A deep canyon-like ocean feature that is caused when one plate subducts under another
19. The "layer" of the Earth that includes the crust and a tiny portion of the upper mantle
20. Boundary where two plates collide with one another

1. Driving force behind plate tectonics as it moves heat from the interior of the Earth to the exterior
3. This type of valley forms at divergent boundaries
4. Boundary that forms a fault
5. Term used to refer to the liquid part of the upper mantle
6. Formed at a convergent boundary where two continental plates meet
7. Formed at a divergent boundary where two oceanic plates pull apart
9. This crust is typically thicker but less dense
11. A scientist who studies earthquakes
14. This crust is typically thinner but more dense
15. A break in the Earth's crust that happens at transform boundaries