How does the temperature and water content of air influence its density?
?The temperature and water content of air greatly influence its density. Because molecular movement associated with heat causes a mass of warm air to expand and occupy more space than an equal mass of cold air, warm air is less dense than cold air. But contrary to what you might guess, humid air is less dense than dry air at the same temperature because molecules of water vapor weigh less than the nitrogen and oxygen molecules that the water vapor displaces.
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Which of the following conditions likely occurs because of the low-level jet stream that forms over the central plains of the United States?
A. nighttime thunderstorms B. onset of a chinook C. development of El Niño D. influx of cold polar air
Lowest natural temperature recorded for the Northern Hemisphere?
Using a physical geography text, an atlas, an encyclopedia, or the Internet, answer the following. Be sure to list temperature record, date, and place.
Meteorologically, conduction is the most important mechanism of heat transfer
Indicate whether the statement is true or false
Suspended particles from sources in Europe and the former Soviet Union are believed responsible for the brownish cloud layer called ____ that forms over the Arctic each spring.
a. the ozone hole b. Asian dust c. Arctic haze d. acid rain e. acid fog