Across
- 3. Mountain Special class of mountains
- 6. Large volcano
- 8. Coming closer together
- 10. Hot fluid
- 13. A place that is very hot
- 15. A sudden and violent shaking
- 16. Hot molten
- 17. The sideways and downward movement
- 18. The powdery residue
- 19. A string of volcanoes and sites of seismic activity
Down
- 1. Form when hot, molten rock
- 2. Where two plates meet
- 4. The largest crustal plate
- 5. The relatively thin part of the earth's crust
- 7. The relatively thick part of the earth's crust
- 9. A destructive mudflow
- 11. The upper layer of the earth's mantle
- 12. A mountain or hill
- 14. A dense, destructive mass of very hot ash