Across
- 5. feature created by subduction or hot spots
- 7. stress at transform boundaries
- 11. sudden release of energy at a fault
- 12. outermost solid portion of Earth
- 13. deepest part of the ocean
- 14. boundary where plates move apart
- 15. process that creates new ocean crust
- 17. process where one plate sinks beneath another
- 19. theory proposed by Alfred Wegener
- 20. plastic layer in the mantle
Down
- 1. molten rock beneath the surface
- 2. heat transfer in the mantle that moves plates
- 3. crack in the crust
- 4. formed on land at divergent boundaries
- 6. rigid outer layer broken into plates
- 8. boundary where plates collide
- 9. boundary where plates slide past each other
- 10. massive moving slabs of rock
- 16. ancient supercontinent
- 18. 2 continental plates crash and form mountains