Across
- 3. An instrument used to measure the strength of an earthquake.
- 4. The place where plates meet.
- 7. Molten rock below the earths surface.
- 8. A very large wave, or waves, created by an earthquake under the ocean floor.
- 9. Molten rock that flows from the crater of a volcano.
- 12. A sudden movement, or tremor, of the earths crust.
- 14. Large sections of the earths crust.
- 15. A roughly circular opening at the summit of a volcano.
- 17. An opening in the earths crust through which material is forced upwards during a volcanic eruption.
- 18. A volcano that has erupted in the last 2000 years but not recently.
- 19. Large rock fragmentsthrown out by an erupting volcano.
Down
- 1. The thin outer layer of the earth.
- 2. A force of nature, such as an earthquake or Tsunami.
- 5. A circle of active volcanoes around the edge of the Pacific ocean.
- 6. Areas, usually along plate boundaries, where earthquakes and volcanoes occur.
- 10. A cone shaped mountain or hill formed by lava and ash.
- 11. A person who studies earthquakes.
- 13. Fine material thrown out by a volcano whilst it erupts.
- 16. A volcano which is not expected to erupt again.