Across
- 2. one plate moves under the other
- 3. how thick a liquid is
- 6. crack in the plates
- 8. elevated region with a central valley on the ocean floor
- 9. depth of earthquake
- 10. the inside of the earth
- 11. a current in a fluid that results from convection
- 15. size of an earthquake
- 17. come apart
- 18. upper layer of the mantle below the lithosphere
- 20. upper mantle and the crust
Down
- 1. the middle of the earth
- 2. when 2 plates pass each other
- 4. super continent
- 5. when 2 plates collide the younger will rise over the other
- 7. one plate slides past another
- 12. linear shaped lowland between several mountians
- 13. one plate slips down relative to the other
- 14. one plate is moved upward to the other
- 16. boundary pull apart
- 19. ocean around the super continent