Across
- 2. the remains of a prehistoric organism preserved as mold
- 5. a massive irregularly shaped slab of solid rock
- 7. the tough center part of the Earth
- 8. two plates moving away from each other
- 9. the tough outer part of something
Down
- 1. two plates coming closer together
- 3. a sideways and downward moving plate
- 4. it is under the crust and it is mostly solid
- 6. a long narrow ditch