Plate tectonics
Across
- 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
Down
- 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