Across
- 3. the study of the earth
- 4. when two plates slide against each other
- 6. the thickest layer of the earth
- 8. on top of the asthenosphere
- 10. formed by convergent boundaries
- 11. Part of the upper mantle
- 12. Caused by divergent plate boundaries
- 13. where molten material rises at the mid-ocean ridge and pushes out the old rock
- 15. Causes the movement of tectonic plates
- 17. when two plates pull apart
- 19. between the mantle and the inner core
- 20. The thinnest layer of the earth
Down
- 1. the first supercontinent
- 2. scientist who theorized plate tectonics
- 5. the theory of earth’s plates moving
- 7. an underwater valley
- 9. where one plate (more dense) dives under another plate
- 14. When two plates push together
- 16. Caused by transform boundaries
- 18. the only solid layer of the earth