Hazardous natural factors

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Across
  1. 5. the side or slope of a mountain
  2. 6. ground near a lake, a river, or the sea that often floods and is always wet
  3. 12. a large fire that causes a lot of damage
  4. 14. a mass of air or water that spins around very fast and pulls objects into its empty centre
  5. 15. the point on the earth's surface directly above an earthquake or atomic explosion
Down
  1. 1. a violent wind that has a circular movement, found in the West Pacific Ocean
  2. 2. a fire in scrub or a forest, especially one that spreads rapidly
  3. 3. a very large mass of ice that floats in the sea
  4. 4. deep wet sand that sucks in anyone trying to walk across it, or an area of sand like this
  5. 7. the scientific study of the sudden, violent movements of the earth connected with earthquakes
  6. 8. the activity of a volcano
  7. 9. a mass of mud (= wet earth) moving suddenly and quickly down a steep slope
  8. 10. a very deep, narrow opening in rock, ice, or the ground
  9. 11. rain made of many very small drops
  10. 13. belonging to or relating to parts of the world that are immediately south or north of the tropics (= the hottest areas) and have very hot weather at some times of the year