Across
- 2. measure of the size of seismic waves
- 4. opening of a volcano
- 6. volcano that takes up the most area
- 7. point where the earthquake begins
- 9. process that forms the mid-ocean ridge and deep ocean trench
- 11. plates move apart
- 13. downward folds in rocks
- 14. layer of earth that we walk on
- 16. concentration of magma in the middle of a plate that can form volcanoes
- 18. amount of force per unit area
- 19. has convection currents that move the plates
- 21. plate move together
- 22. scientist who proposed the idea of continental drift
Down
- 1. made of ash and cinders
- 3. fault caused by shear stress
- 5. When rock and soil turn into liquid during an earthquake
- 8. mountains formed when rock layers come together at convergent boundaries
- 10. fastest type of earthquake wave
- 12. hanging wall moves down in relation to the footwall
- 14. made of lava and pyroclastic materials
- 15. broken up into plates that move in various ways
- 17. plates move parallel
- 18. most destructive type of earthquake wave
- 20. supercontinent that existed 200 million years ago