Plate tectonics

2. the boundary between tectonic plates that slide past each other horizontally
3. a long steep-sided depression in the ocean floor
5. a large ocean that covered earth during the time of pangaea
7. long undersea mountain chains that have a narrow valley in the center
8. wegener German scientist that proposed the hypothesis of continental drift
10. the boundary between tectonic plates that are moving away from each other
11. the hypothesis that the continents formed a single landmass
12. the boundary between tectonic plates that are colliding
15. a piece of lithosphere that has a unique geologic history
16. molten rock in earths core

1. the process by which a super continent forms and breaks apart over millions of years
4. proved continental drift
6. the study of the alignment of magnetic minerals in rock
9. the lower layer of the crust
13. the process by which earth breaks apart
14. supercontinent formed 300 million years ago