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We all know that as we go higher in the atmospherethe temperature decreases. Therefore the capability of air to hold the water vapour decreases and excess of water vapour gets collected in the air at a certain height. The air, now having too much water vapour, is said to be supersaturated. Under these conditions, the water vapour condenses on the dust particles present in the air. On further cooling, the water vapour gets converted into snow particles. Crystals of snow are formed by the combination of these particles. When the air cannot bear the weight of the crystals of snow, they fall down as snow flakes and get collected on the mountains.

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12y ago

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