Water vapor can condense on sea salt, dust, smoke particles, volcanic ash, or nitrous oxide, to make drops one millionth raindrop size {cloud}|. Nitrous oxide forms by lightning. Tiny drops coalesce. When big enough, they drop. Fine raindrops come from low clouds, and big raindrops come from high or thick clouds. Clouds are white if water density is small and are dark if water density is great. Cloud shapes depend on fronts that make them.
Physical Sciences>Earth Science>Atmosphere>Cloud
5-Earth Science-Atmosphere-Cloud
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Date Modified: 2022.0224