Across
- 6. unstable atomic nucleus loses energy by radiation
- 9. ridge shaped fold going downward
- 11. earth being forced towards itself
- 12. fault where the stress is shearing
- 16. second wave in an earthquake
- 17. fault where the stress is tension
- 18. central spot of an earthquake at the surface
- 20. solid bulk of the Earth's interior
- 22. outermost shell of the Earth
Down
- 1. tectonic movement
- 2. outermost physical layer
- 3. wave in the earth caused by earthquakes
- 4. Between mesosphere and lithosphere
- 5. earth being pulled in opposite directions
- 7. between the lithosphere and outer core
- 8. center of an earthquake under the crust
- 9. earth moving past itself
- 10. last, most damaging earthquake
- 13. liquid layer underneath the crust
- 14. first, calmest earthquake wave
- 15. ridge shaped fold going upward
- 19. fault where the stress is compression
- 21. dense ball of nickel and iron in the center of the earth