Across
- 2. melted rock
- 6. theory that the rigid, cool outer layer of Earth is divided
- 8. an idea we want to put forward
- 9. name of Earth when it was one large continent
- 10. when the crust shifts
Down
- 1. plates moving away from each other
- 3. old crust is destroyed
- 4. large pieces of Earths outer layer
- 5. formed at plate boundaries
- 7. Earths outer layer