Across
- 2. Giant piece of ice that create grooves in the Earth
- 5. Deep parts of ocean floor
- 7. Thickest layer of Earth
- 10. Earth layer hotter than the surface of the sun
- 12. The number of continents there are today
- 13. Southern supercontinent created after Pangaea split
- 17. Process where new crust is created and old crust is pushed away
- 19. Found at the top of mountain and used as evidence
- 20. Shows age of sea floor
- 21. Molten rock under the Earth's surface
- 22. Outermost layer of the Earth
Down
- 1. Man who created Continental Drift Theory
- 3. Earth layer made of liquid metal
- 4. Mountain ranges underwater
- 6. Theory that continents drifted apart
- 8. Molten rock above Earth's surface
- 9. Original supercontinent that included all land
- 11. Northern supercontinent created after Pangaea split
- 14. Same types found on multiple continents, used as evidence
- 15. Shows heights/depths of sea floor
- 16. Giant slabs of rock that make up the crust
- 18. Technology used to map sea floor