Across
- 3. Harry Hess used it to map the ocean floor
- 6. proposed the theory of continental drift
- 9. extremely hot area that created the Hawaiian Islands
- 11. created on land by divergent boundary
- 12. smallest plate affecting the USA
- 17. boundary that causes subduction
- 19. boundary where plates move apart
- 20. heat transfer mechanism found in the mantle
- 21. short life but there were many
- 22. impression of prehistoric organism
Down
- 1. rigid layer formed by the crust and upper mantle
- 2. Earth's plates are in ________ motion
- 4. Mid Atlantic _________
- 5. deepest part of the ocean
- 7. sudden and violent movement that creates P and S Waves
- 8. created when two oceanic plates converge
- 10. the ring of fire surrounds this plate
- 13. Law that states oldest layers are deeper
- 14. where two plates interact
- 15. all continents united as one
- 16. type of boundary that produced the St Andreas
- 18. denser crust that will subduct