One some days the sky is covered over with layers of clouds. Some clouds are big fluffy white clouds, some are feathery streamers high in the sky and some are thick, shapeless clouds that darken the earth and often bring rain.
Clouds are made mostly of tiny drops of water drifting on currents of air. They are like the little clouds from a person’s breath on a winter day.
Water to make clouds comes from oceans, lakes and streams. This water is constantly evaporating into the air and floating up in invisible day.
Water to make clouds comes from oceans, lakes and streams. This water is constantly evaporating into the air and floating up in invisible drops.
Often it is carried upward by currents of warm, rising air. As the warm air rises it cools, and often water vapor changes (condenses) into little droplets of water that cling to tiny specks of dust and dirt in the air.
If the temperature is below freezing, the water vapor turns into tiny ice crystals instead. When many of these water droplets or ice crystals form in the air we can see them as a cloud.
Not all clouds are up in the sky. When a cloud is close to the ground we call it “fog”.
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