Across
- 4. a way to see inside an object
- 5. layer of soft solid rock below earth's plates
- 7. a land form found at a convergent boundary
- 8. moving toward each other
- 10. a large section of earth's outer layer made of hard, solid rock.
- 11. tool used by Bob Ziak in the "listening to earth" article
Down
- 1. considered part of a plate
- 2. moving away from each other
- 3. the place where two plates meet
- 5. a land form found at a divergent boundary
- 6. something observed over and over again
- 9. a sudden shaking of earth's surface
