Down comes the Rain

Down comes the Rain

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Rain comes from clouds. It comes from big clouds and little clouds.

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It comes from black clouds, white clouds， and gray clouds

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All clouds-big ones and little ones, gray ones and white ones-are made of billions of tiny drops of water. The drops are called droplets, because they are so small. If this is the size of a drop of water, a droplet would be just a tiny speck, even smaller than this one.

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Water droplets come from water vapor. Water vapor is a gas. There's always can't water vapor in the air, but you can't SEE it. . . . . . can't SMELL it. . . . . and you can't FEEL it.

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Water vapor is made when water evaporates. That means the water changes from a liquid to a gas.

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