Across
- 4. vibrations that travel through Earth
- 5. rigid crust
- 10. a narrow long ditch
- 11. partially molten
- 13. supercontinent
- 14. recycling plates
- 15. material under the Earths surface
- 16. moving apart
- 19. plates moving apart from each other cause
- 20. created theory of continental drift
Down
- 1. skin of the Earth
- 2. erupting pieces of Earths surface
- 3. mountains rising through the ocean floor
- 6. plates sliding together
- 7. circularmotion of the liquid in the mantle due to uneven heating
- 8. move on top of the asthenosphere
- 9. move together
- 12. valley that is diverting
- 17. shaking of the Earths surface
- 18. thickest layer of the Earth