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Which observation indicates that rain is approaching? a. falling barometer, increased cloudiness, rising temperatures. b. rising barometer, decreased cloudiness, falling temperatures c. rising barometer, increased cloudiness, rising temperatures d. falling barometer, increased cloudiness, falling temperatures.

Rodney Fox

in Chemistry

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Kevin Sutter on June 24, 2018

The answer is A. A drop in the barometer means a decrease in the pressure of the air. This is caused by an increase in local temperatures that heat the air and make it less dense. The clouds begin to form when warm, humid air begins to rise and the cold. The water of the moisture turns into droplets of water.


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