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The three ingredients needed to form a snowflake are as follows:

  • water vapor
  • ice crystals
  • dust.

Ice crystals form when water vapor freezes on a microscopic piece of dust. This dust can come from volcanoes, flower pollen, meteorites falling stars, soil erosion and much more. Snow begins forming in a very cold cloud that has both super cold water droplets and ice crystals. When water vapor droplets collide with a piece of already formed ice crystal, the droplet freezes to it making it grow into a slightly larger new ice crystal. The shape of the snow crystal is determined by the temperature in the cloud. The size of an ice crystal is determined by moisture in the cloud.

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14y ago

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