Across
- 3. a bad thing happens
- 6. old on bottom and new on top
- 7. rigid brittle layer made up of the crust and the uppermost part of the mantle
- 8. plates moving away
- 9. plates moving together
- 10. what scientists call the edges where tectonic plates meet
- 11. plates moving side by side
- 12. a big shake in the ground
- 13. flexible upper layer of the mantle
- 15. we live on it
Down
- 1. naturally occurring solid
- 2. theory that the continents moved to where they are now
- 4. The period of time covering the physical formation and development of Earth
- 5. a use to be mountain
- 14. a once super continent