Earthquakes & Volcanos

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Across
  1. 6. The point on the ground directly above the focus
  2. 7. A hole through which lava erupts at the earth's surface
  3. 8. The middle layer of the earth, between the crust and core
  4. 9. The inner layer of the earth
  5. 11. A flood of gas, dust, ash,rushing down side of volcano
  6. 14. The shaking of the earth's surface
  7. 16. Melted rock that erupts from a volcano
  8. 18. A wave of energy given out in an earthquake
  9. 20. A place where lava erupts at the earth's surface
Down
  1. 1. The earth surface is broken into large pieces
  2. 2. The thin outer layer of the earth, made of rock
  3. 3. A current of warmer materials
  4. 4. Like sulphur dioxide which can suffocate people
  5. 5. A scale used to measure the intensity of a volcanic eruption
  6. 10. A scale for measuring the energy given out in an earthquake
  7. 12. The 'centre' of an earthquake
  8. 13. Melted rock below the earth's surface
  9. 15. Small tremors that may occur before an earthquake
  10. 17. How much energy an earthquake gives out
  11. 19. The summit of a volcano