Environmental Science
The most abundant gases in the earth's atmosphere by volume are:

Nitrogen and oxygen
Oxygen and ozone
Oxygen and helium
Carbon dioxide and nitrogen
Oxygen and water vapor

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Environmental Science
Suppose it is a winter night and at about 11 p.m., the air cools to the dew-point temperature and a thick radiation fog develops. If the air continues to cool during the night, in 5 hours the dew point temperature will probably:

Decrease as the air becomes moister
Decrease as the air becomes drier
Increase as the air becomes drier
Increase as the air becomes moister

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