Meteorology Ch. 18

Which form of precipitation is likely to occur when a layer of air with temperatures above freezing overlies a subfreezing layer near the ground?

• snow

• sleet

• rain

• hail

Most fogs are the result of which of the following?

• the movement of air over a cold surface

• radiation cooling

• orographic lifting

• both a and b

What is true about warm, saturated air?

• It contains the same amount of water vapor as cold air.

• It contains less water vapor than cold air.

• It contains more water vapor than cold air.

• It does not contain any water vapor.

The ratio of air’s water-vapor content to its capacity to hold water vapor at that same temperature is the

• specific humidity

• vapor pressure

• wet adiabatic rate

• relative humidity

Which clouds are often associated with thunder and lightning?

• cirrostratus

• cumulonimbus

• nimbostratus

• altostratus

Which of the following refers to the temperature to which air would have to be cooled to reach saturation?

• dew point

• adiabatic rate

• vapor

• relative point

When two temperatures read nearly the same on a psychrometer, you can conclude that

• the air has a high relative humidity.

• the dew point temperature is very low.

• a change in temperature is likely.

• your instrument reading is accurate.

What conditions favor the formation of fog by radiation cooling?

• warm, clear, windy nights

• warm, cloudy, calm days

• cool, clear, calm nights

• cool, cloudy, windy nights

Which term describes the conversion of a solid directly to a gas, without passing through the liquid state?

• evaporation

• condensation

• sublimation

• deposition

Which cloud type consists of globular cloud masses with a cauliflower structure?

• cumulus

• stratus

• cirrus

• alto