Cool Science - 7/1/13: Clouds

By Emma Koch

July 1, 2013 Updated Jun 27, 2013 at 12:06 PM EST

FORT WAYNE, Ind. (www.incnow.tv) -- In this week's episode of Cool Science Monday, Martin Fisher from Science Central will talk about clouds.

Martin added three “ingredients” to a large glass jar. Air from the atmosphere, a squirt of water, since there is always water vapor in the atmosphere and smoke to represent particulates, or particulate matter (such as smoke from a forest fire, ashes from a volcano, pollen from plants or pollution).

We typically see clouds up in the sky, since it’s cooler up there, and the air pressure is lower (there is less air). Martin connected the jar to a vacuum pump, which removed air from the jar. This decreased temperature and pressure. The water condensed (stuck) onto the particulates, and a cloud formed in the jar.

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