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This is easier to picture with a particular example. Have you seen clouds with flat bottoms, like a lot of small clouds that all have flat bottoms at the same level? These clouds are blobs of air with more moisture than the surrounding air. The flat bottom type are from rising air from heat convection. This is what pilots call "thermals". The air cools as it ...


Have you ever walked through fog? What is it made of? Lots of very small water droplets. They are so small that their weight is negligible compared to the motion of air molecules, so they fall too slowly to ever notice. Next time you boil water, and you see "steam", what is it? Same thing. The only difference between fog and a cloud is that fog is a cloud ...

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