Geography terms

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Across
  1. 2. flood What do you call a sudden short-lived rainfall in a dry valley?
  2. 4. What do you call a violent eddy in a body of water?
  3. 7. What do you call the amount of water vapor in the air?
  4. 9. What is the vertical height above sea level called?
  5. 10. What do you call a place in the desert where there is water?
  6. 12. What do you call weather phenom that limits visibility?
  7. 13. What do you call an area of spongy ground?
Down
  1. 1. What do you call a fall of snow and ice down a mountain?
  2. 3. What is a cluster of islands called?
  3. 5. What do you call a tropical forest with thick undergrowth?
  4. 6. What do you call an extensive area of treeless grassland?
  5. 8. What do you call the ridges of sand in a desert?
  6. 11. What do you call a thick yellow fog with soot, dust and Sulphur dioxide?