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