Clouds

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Across
  1. 2. fog that forms as cool air moves over a warm moist surface
  2. 3. water droplets stick together to form larger drops
  3. 6. fog that forms as earth cools at night
  4. 9. top layer of rock through which water flows but does not stay
  5. 10. clouds that are likely to bring rain
  6. 12. rain with lower than normal pH level
  7. 16. changing of water from liquid to gas without boiling
  8. 18. where the zone of aeration and zone of saturation meet
  9. 20. releasing of water vapor into air by breathing or photosynthesis
  10. 21. 100% relative humidity
  11. 22. fluffy, billowy clouds
  12. 24. rising of warm air
  13. 26. rock with holes that allows water to flow through it
  14. 27. wispy, curly clouds
Down
  1. 1. fog that forms as warm air cools as it is forced up the slope of a mountain
  2. 4. dropping chemicals into clouds to encourage raindrop formation
  3. 5. lower layer of rock filled with water
  4. 7. ____ nuclei: particles to which water droplets stick when coalescing
  5. 8. changing of water from liquid to gas by boiling
  6. 11. a place where ground water comes to the surface
  7. 13. when water vapor cools and turns into liquid water
  8. 14. clouds that touch the earth
  9. 15. fog that forms as wind moves warm moist air over cooler surface
  10. 17. rock that does not let water flow through it
  11. 19. water circulation mainly by evaporation and precipitation
  12. 23. clouds that are stretched out in thin layers or sheets
  13. 25. fog that forms as warm air passes over cool air in a mountain valley