Across
- 4. where plate tectonics meet
- 9. inner layer of earth
- 10. tench caused by subduction
- 11. force compressing object
- 14. where plate tectonics pull apart
- 16. study of earth
- 17. top layer of earth
- 19. plate tectonic goes under a different plate tectonic
- 20. continents move
Down
- 1. all continents combined
- 2. mass per unit
- 3. transfer of heat between objects
- 5. devise that locates objects by using sound waves
- 6. most common igneous rock
- 7. large land mass
- 8. remains of animals preserved in rocks
- 12. largest layer of earth
- 13. earth scientist
- 15. solid mineral material
- 18. well tested concept