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How do clouds stay in the sky and not fall?

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How do clouds stay in the sky and not fall?

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Well, sometimes cloud particles do fall, and this is called precipitation. Sometimes clouds are on the ground; these are called fog. Clouds are composed of droplets of condensed water vapor or crystals of frozen ice. These particles are usually so tiny that they do not fall to the ground because resistance with the air slows them so much that it would take the typical cloud droplet something like two days to fall from normal cloud heights. Additionally, there are often air currents moving upward into clouds, that help suspend cloud particles in air. However, when cloud droplets or crystals grow large enough (read up on the collision/coalescence and Bergeron processes for more details if you wish) they are able to fall to the Earth as precipitation. In short, cloud particles do not fall to Earth when they are so small that the combined effects of air resistance and upward air currents keep them suspended.

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