Across
- 4. Global Positioning System
- 5. a sample of the inside of the earth
- 8. how often/fast something happens
- 13. Someone who studies history of Earth
- 14. shows the inside of a core sample
- 15. sudden shaking
Down
- 1. 2 plates move away from each other
- 2. when 2 plates collide
- 3. a layer of solid rock
- 6. the three types of tectonic plates
- 7. pieces of the earths crust
- 9. between the crust and outer core
- 10. Someone who studies the earth
- 11. The solid parts of the earth
- 12. A preserved specimen