Understanding Weather

Understanding Weather and Climate, 5e (Aguado/Burt)

Chapter 5 Atmospheric Moisture

1) Humidity:

A) refers to the ratio of the number of water vapor molecules to the number of permanent gas molecules in a given sample of air.

B) has only one truly useful measure, at least for meteorologists.

C) includes the amount of ice suspended in the air.

D) is dependent upon vapor pressure.

2) Humidity:

A) is measured only one way.

B) is unrelated to the vapor pressure of water.

C) is a measure of only the water vapor in the air.

D) applies to water, whether solid, liquid, or vapor.

3) Which of the following are processes that occur under the Hydrologic Cycle?

A) precipitation

B) infiltration

C) evaporation

D) all of the above

4) The residence time of water in the atmosphere is about:

A) 12 hours

B) 1 day

C) 10 days

D) 100 days

5) Absolute humidity is:

A) density of water vapor.

B) the best measure of water content.

C) not affected by changes in volume or pressure.

D) none of the above

6) As the temperature increases, generally, the relative humidity:

A) is erratic.

B) decreases..

C) increases.

D) is unaffected.

7) A sling psychrometer uses:

A) synthetic fibers.

B) differing electrical resistance.

C) dry- and wet-bulb temperature readings.

D) none of the above

8) Steam fog would be most likely to occur in:

A) late fall and early winter.

B) late winter.

C) spring.

D) summer.

9) Vapor pressure is:

A) the part of atmospheric pressure due to water vapor.

B) typically measured in millipascals in the United States.

C) a common part of weather reports.

D) independent of temperature.

10) Saturation vapor pressure is dependent upon this variable:

A) temperature.

B) air composition.

C) air pressure.

D) time of day.

11) The number of grams of water vapor in a cubic meter of air is called the:

A) vapor pressure.

B) specific humidity.

C) relative humidity.

D) absolute humidity.

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