weather and natural disasters

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Across
  1. 3. the coldest part of the year
  2. 6. a large build up of water
  3. 7. when the land slides away from excessive weight
  4. 9. a large amount of ice and snow breaking off
  5. 11. the hottest part of the year
  6. 13. a large fire in a park or forest
  7. 15. referring to the amount of moisture in the air
  8. 16. a big storm
  9. 17. the height above the sea
Down
  1. 1. tiny pieces of frozen water that fall from the sky
  2. 2. a gas that protects the earth from UV rays
  3. 4. another name for a tsunami
  4. 5. a snow storm
  5. 8. a seismic movement of land
  6. 10. when a volcano throws out hot materials
  7. 12. water that falls from clouds
  8. 14. the movement of air in the atmosphere
  9. 18. a seismic wave