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Q: Why do clouds float if there is gravity on Earth?

A: Clouds are made up of small water droplets and, at cold temperatures, ice crystals. "The droplets of water in clouds are so tiny that they are carried along with the wind, sort of like leaves," says Gene Takle, a meteorologist at Iowa State University. But as the droplets grow, they reach a point where they're heavy enough for gravity to pull them down. "When the droplets get big enough, they fall out of the clouds as rain," says Takle.

QUESTION FROM Emily G., Florida

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Title Annotation:the Back Page; floating clouds amidst gravity
Author:G., Emily
Article Type:Brief article
Geographic Code:1USA
Date:Nov 1, 2009
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