Across
- 4. ___ crust was close to ridge.
- 7. ___ came up with sea floor spreading.
- 8. What motion does sea floor spreading create?
- 11. HARD: Continents move one ___ annually.
- 12. ___ came up with continental drift.
- 14. ___ crust is created by ridges.
- 15. Evidence of sea floor spreading
- 16. Why was continental drift denied?
- 17. Oceanic crust is subducted to ___.
- 20. Wegener's theory was ___.
Down
- 1. Evidence of continental drift
- 2. What subducts crust?
- 3. Evidence of sea floor spreading
- 5. What century did Wegener discover continental drift?
- 6. What century did Hess discover sea floor spreading?
- 9. Name of super-continent
- 10. Process of crust being pulled down
- 13. Evidence of continental drift
- 18. ___ and SA fit together almost perfectly.
- 19. What does crust come out of?