Across
- 4. A feature that forms on the surface of a planet such as a mountain
- 9. evidence of life from the past
- 11. a sudden shaking of Earth's surface
- 13. how often or fast something happens
- 14. an extinct reptile
- 15. something we observe over and over again
- 16. moving toward the same place
- 17. a long deep indentation in the ocean floor formed when 2 plates move together
- 19. boundary where two plates meet
Down
- 1. hot liquid rock below the surface of the Earth
- 2. section shows the inside of something
- 3. a large section of hard solid rock
- 5. moving apart in different directions
- 6. to examine in detail
- 7. ridge an underwater mountain found at divergent plate boundaries
- 8. the layer of soft, solid rock underneath the plates
- 10. layer earth's outermost layer of hard, solid rock
- 12. hot liquid rock on the surface of Earth
- 18. any of earth's main continuous areas of land