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Exam 4: Atmospheric Humidity

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Question 31

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In terms of the air temperature and water vapor content,explain how the relative humidity normally changes during the course of a 24-hour day.

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Question 32

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Frozen clothes "dry" outside in subfreezing weather by a process called ____________________.

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Question 33

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As the difference between the air temperature and the dew point increases,the relative humidity​

During the great Chicago heat wave of July 1995 the afternoon air temperature reached 106 degrees Fahrenheit at Midway Airport,followed by an overnight low temperature of only 84 degrees Fahrenheit.Many residents either had no air conditioning or could not afford to use it.More than ____ deaths occurred over five days.​

Describe how a sling psychrometer can be used to determine the relative humidity or dew point.

Nighttime temperatures rarely drop below the dew point temperature because at saturation,latent heat of condensation is released into the air.

In the solid state called ice,the shape and charge of water molecule helps arrange the molecules into ____ crystals.​

A region can have a high specific humidity and low relative humidity because large amounts of water vapor in the air and very high air temperatures will cause the specific humidity to be high,but the relative humidity to be low.

The temperature at which water boils depends mainly on​

Why are specific humidity and mixing ratio more commonly used in representing atmospheric moisture than absolute humidity? What is the only way to change the specific humidity or mixing ratio of an air parcel?

A temperature of 90 degrees Fahrenheit and a relative humidity of 90 percent can occur only if the ____ is incredibly high,which is only very rarely observed in the United States.​

As the air temperature increases,the air's capacity for water vapor​

Saturation vapor pressure over water is ____________________ than over ice.

Plants give up moisture by a process called perspiration.

In summer across North America,____ vapor pressures are experienced over the drier Great Basin,especially Nevada;in winter,____ values exist over the northern Great Plains into Canada.​

Explain why the dew point temperature provides a better indication of the actual amount of water vapor in the air than relative humidity.

Saturation vapor pressure primarily depends upon air pressure.

Which of the following will increase in a rising parcel of air?​

Using the concept of supercooled water,explain why ice cubes sometimes feel "sticky" when taking them out of the freezer.

At what time of day is the relative humidity normally at a minimum?​