Across
- 3. A more middle region in the earth
- 5. Number of species in one area
- 6. Weakness in the crust
- 7. Drives plate tectonics
- 8. Forms from erosion
- 11. Ancient supercontinent
- 13. The center region of earth
- 14. Upper region of earth
- 17. When Plates move towards each other
- 20. Depressions in the ocean
- 21. Pieces of moving earth
Down
- 1. When plates slide past each other
- 2. A slow, catastrophic event
- 4. Where molten rock is ejected
- 9. Rock formed by pressure
- 10. Rock formed by cooling
- 12. When Plates move away from each other
- 15. Records funny little waves
- 16. How new oceanic crust is formed
- 18. A quick, catastrophic event
- 19. Formed at plate boundaries