Chapter 18 and 20 review questions
If the water vapor of air remains constant,lowering air temperature causes what ?
an increase in relative humidity and raising air temperature causes a decrease in relative humidity
What is true about warm saturated air ?
contains more water vapor than cold air
Compared to clouds,fogs are ?
Clouds result when air rises and cools.
Fog is a cloud with its base at or near the ground
Air that has reached its water vapor capacity is said to be ?
Saturated
Hurricanes form in tropical waters between the latitudes of what ?
5 and 20 degrees north and south latitude
What type of front forms when the surface position of the front does not move ?
Stationary front
The process of converting a liquid to a gas is known as ?
Evaporation
The boundary that separates different air masses is called what ?
Front
What is the first sign of an approaching warm front ?
the appearance of cirrus clouds
What kind of shape is associated with a middle latitude cyclone ?
Wave shape
What is the dry adiabatic rate ?
Rate of cooling or heating in unsaturated air
A low cloud that blankets the sky and often generates precipitation is called an ?
Nimbostratus
Which terms is used to describe clouds of middle height ?
Alto
The process by which water vapor changes directly into a solid is called ?
Deposition
An immense body of air characterized by similar properties at any given altitude is known as ?
Air mass
Which of the following refers to the temp to which air would have to be cooled to reach saturation ?
Dew point
Water Vapor makes up what fraction of atmospheric gases ?
0 to 4 percent
Which gas is the most important for understanding atmospheric processes?
water vapor
The ratio of air’s water vapor content to it capacity to hold water vapor at that same temperatures is the ?
Relative humidity
Which of the following refers to he energy that is stored or released during a change of state of water ?
Latent heat
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