Science Now 6 Natural disasters

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Across
  1. 5. Magma that has erupted outside of a volcano
  2. 7. The size of an earthquake
  3. 8. A series of waves caused by an earthquake below the sea
  4. 10. A point where an earthquake begins
  5. 12. A natural way for earth to release internal pressure
  6. 14. Below earth's crust
  7. 15. The system used to measure water surface changes and movements
Down
  1. 1. caused by unusually low rainfall over a prolonged period of time
  2. 2. Caused when pressure builds and gases expand
  3. 3. Mixture of molten and semi-molten rock and gases
  4. 4. A device to measure and record the size and power of seismic waves
  5. 6. Is likely to erupt
  6. 9. The location where seismic waves reach the surface
  7. 11. Earth scientists who study seismic waves
  8. 13. Where tectonic plates meet