Across
- 4. a hill or mountain that has magma in it
- 7. boundary two plates collide
- 12. land that has been elevated
- 13. the place we live
- 15. boundary where two plates slide past each other
- 16. plates portion of earths crust that lies beneath the oceans
- 17. ocean ridge an underwater mountain system
- 18. floor spreading process that occur at mid ocean ridges
Down
- 1. the second layer of the earth
- 2. drift alfred wegeners hypothesis that continents were on joined together
- 3. spot a place that is not at a plate boundary
- 5. plates portion of earths crust that lies above sea level
- 6. boundary two plates move away from each other
- 8. energy travelling as waves passing through earth
- 9. another word for lava
- 10. valley a valley created by divergent plates
- 11. of plate tectonics a theory that explains how the continents separated
- 14. a giant and dangerous wave
- 16. basin a geological basin found in the sea