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CH 18 Review

CH 18 Review. Water in the Atmosphere. If the specific humidity is 5 g/kg and the water vapor capacity is 10 g/kg, the relative humidity is… A. 25% B. 50% C. 5% D. 10%. B. 50%. Water droplets in fog are ______ to move with slight movements of air A. difficult B. easy C. impossible.

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CH 18 Review

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  1. CH 18 Review Water in the Atmosphere

  2. If the specific humidity is 5 g/kg and the water vapor capacity is 10 g/kg, the relative humidity is… • A. 25% • B. 50% • C. 5% • D. 10%

  3. B. 50%

  4. Water droplets in fog are ______ to move with slight movements of air • A. difficult • B. easy • C. impossible

  5. B. easy

  6. When the air is saturated it has _______% relative humidity?

  7. 100%

  8. Dew point is the __________ at which condensation begins • A. air pressure • B. relative humidity • C. specific humidity • D. temperature

  9. D. temperature

  10. The moist-adiabatic lapse (cooling) rate is __________ than the dry-adiabatic lapse (cooling) rate. • A. greater (faster) • B. less (slower) • C. the same

  11. B. less (slower)

  12. The air temperature at different elevations, the cooling rate of rising air, and the dew point help meteorologist predict where clouds will form. This altitude (height) is known as the ___________ level.

  13. condensation

  14. Condensation occurs when the air temperature drops to or below the ______

  15. Dew point temperature

  16. Precipitation is ________________________________________________________________________

  17. Water (in any state) falling from cloud

  18. The smoke from the match in our cloud lab, gave us ___________, on which the water could form around.

  19. Condensation nuclei

  20. Clouds can form in all layers of the ____________.

  21. troposphere

  22. Air that is moist, rising, and cooling will be found on the _______________ side of a mountain.

  23. windward

  24. The actual amount of water vapor in the air is the • A. relative vapor content • B. relative humidity • C. specific (absolute) humidity

  25. C. specific (absolute) humidity

  26. At -30 degrees Celsius clouds are formed mostly of • A. ice crystals • B. supercooled water • C. snow • D. Both A and B • E. Both A and C • F. Both B and C

  27. E. Both A and C

  28. Cumulus clouds need a continuous supply of _____________ to grow. • A. Warm, dry air • B. Cool, dry air • C. Cool, moist air • D. Warm, moist air

  29. D. Warm, moist air

  30. When warm, moist air blows over a cold surface, ________ can form.

  31. fog

  32. Rain, sleet, hail, snow, and drizzle are forms of ___________

  33. precipitation

  34. Rain shadow deserts are found on the ____________ side of a mountain.

  35. leeward

  36. The dry-adiabatic lapse rate (for unsaturated air) is about ______ degrees Celsius per kilometer.

  37. 10

  38. Air temperature does not affect ________ humidity • A. relative • B. specific (absolute)

  39. B. specific (absolute)

  40. A cooling rate of 5-9 degrees Celsius represents the ___________-adiabatic lapse rate • A. Dry • B. Wet

  41. B. Wet

  42. When the air is saturated, the wet- and dry-bulb temperatures on a sling psychrometer will be _____________.

  43. The same

  44. As air cools, it’s ability to hold water (water vapor capacity) • A. increases • B. decreases • C. remains the same

  45. B. decreases

  46. In evaporation water changes phase (state) from _________ to ___________

  47. Liquid to gas (vapor)

  48. In condensation, water changes phase from ___________ to ___________

  49. Gas (vapor) to liquid

  50. The first thing that happens to water (vapor) in the air when the dew point is reached is it __________

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