Across
- 3. Large slab of Earth's crust
- 7. moving apart
- 8. Volcanic rock fragments
- 11. Hot flowing liquid
- 12. Upper mantle
- 13. hot molten rock
- 16. Rigid shell of the earth
- 17. Light
- 19. Above Eearthquake
- 20. Second seismic wave
Down
- 1. Crack in the Earth's crust
- 2. Rock changed by heat and pressure
- 4. Heat by motion
- 5. records sound motion from seismic waves
- 6. Earths solid central layer
- 8. Super continent
- 9. Volcanic rock type
- 10. super hot liquid layer of earth
- 14. Scales to measure earthquakes
- 15. together
- 18. Fastest seismic wave