Why Do Mountains Often Have Snow on Top?


As air travels, it picks up water molecules in vapor form, which remain vaporous in the higher pressure at low elevations. The increase in elevation and drop in pressure cause the water vapor to cool until it reaches the dew point and condenses in the air into water droplets. These droplets are visible as cloud formations. The air may continue to cool and condense until it forms rain or snow, which will fall on the windward side of the mountain
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