Across
- 3. an opening in the earths crust that expels lava magma and other substances
- 7. two boundaries that move toward each other.
- 9. two boundaries that move away from each other.
- 10. the molten rock inside the earth
- 12. the section of earth beneath the earth's crust
- 13. a ridge underneath the Atlantic ocean that expels magma
- 19. caused by two continental convergent plates
- 20. the super continent
Down
- 1. two boundaries that slide against each other.
- 2. his first name is Alfred, people made fun of his theory
- 4. the molten rock exposed in earth's crust
- 5. the pieces of the earths crust and lithosphere make up this
- 6. caused by one continental plate and one oceanic plate.
- 8. the spastic shaking of the earths crust.
- 11. the scientist that confirmed the theory of sea floor spreading
- 14. the crust and upper mantle make up this
- 15. under water earthquakes can cause this.
- 16. caused by divergent boundaries
- 17. the center of the earth
- 18. caused by transform boundaries