by 3 hours ago
ANSWERS: 3
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When it rains on a day when the temperature is below freezing, the raindrops freeze into snowflakes, the fluffy white stuff you usually see during winter.
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Snow forms high in the atmosphere with the help of particles, such as dust, volcanic ash or sea salt. These flecks serve as condensation nuclei-something onto which water vapor can cling. Without these little particles, water vapor can remain unfrozen down to minus 40 degrees. The meeting between a supercooled cloud of water vapor and a sprinkling of dust often results in a snowstorm. Seeded with dust, supercooled water vapor turns into ice crystals. These ice crystals then latch onto surrounding molecules of water vapor as they float around within the cloud. As the crystals grow, parts break off and act as nuclei for other crystals. As the crystals fall through warmer layers of air, they link up by the thousands to form snowflakes. http://www.gi.alaska.edu/ScienceForum/ASF14/1474.html
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Tiny fairies who live in the clouds catch ice crystals and cut them into snowflakes using their magic snow scissors- but if you want to go with the scientific interpretation that's ok too.
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