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Study Guide Answers

1.     Clouds are: (a) the most visible manifestations of the weather (b) the source of all forms of precipitation (c) important for weather forecasting (d) all of the above.
      (d) all of the above
2.     The term for the amount of water vapor in a mass of air as a percentage of the maximum possible amount for air at a given temperature is: (a) relative humidity (b) the dew point (c) the condensation level (d) convection rising (e) none of the above.
     a) relative humidity
3.     Condensation of water vapor begins when relative humidity reaches _______ percent.
     100
4.     What is the term for the cooling that occurs as moist air is lifted over mountains? (a) surface contact (b) alpine (c) frontal (d) convection (e) orographic
     (e) orographic
5.     Layered clouds associated with stable conditions that reduce the tendency of air to rise are: (a) low clouds (b) stratiform clouds (c) cumulus clouds (d) cirrus clouds (e) high clouds.
     (b) stratiform clouds
6.     Cumulus clouds: (a) are associated with inversion layers (b) have cauliflower-like forms (c) are always made up of ice crystals (d) are fibrous in appearance (e) are common in the stratosphere.
      (b) have cauliflower-like forms
7.     The troposphere to stratosphere transition zone is the ____________________________.
     tropopause
8.     The tops of most high clouds extend into the stratosphere. [ ] True [ ] False.
     false
9.     The expansion and cooling of air masses as they rise is called _______________________________.
     adiabatic cooling
10.     The term for an air mass that has reached its maximum capacity to hold water vapor is: (a) critically humid (b) saturated (c) maxed out (d) cloudy (e) vaporized.
     (b) saturated
11.     The amount of water vapor an air mass can hold is related to its temperature.[ ] True [ ] False
     true
12.     Clouds are classified by shape, height of their bases above ground, and __________ ______________
     type of precipitation
13.     A stratiform cloud that yields significant amounts of precipitation.
     nimbus clouds
14.     Sometimes called a thunderhead because of its association with thunderstorms.
     cumulonimbus clouds
15.     Appear as a white sheet made up of small individual cloudlets, sometimes called a mackerel sky.
     cirrocumulus clouds
16.     Characterized by rounded puffy forms with lumpy bases often above the condensation level.
     stratocumulus clouds
17.     Gray to bluish white layers that often form when warm air rides over cool air ahead of a warm front.
     altostratus clouds
18.     Rounded puffy forms may appear dark and threatening, but do not yield large amounts of precipitation.
     stratocumulus clouds
© Educational Video Network, Inc. 2005 - www.evndirect.com
Your leading source for curriculum-based educational videos and DVDs.