How does snow form?

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Multiple Choice

How does snow form?

Explanation:
Snow forms when water vapor in the cold parts of the atmosphere deposits directly onto solid ice crystals, which grow into snowflakes as they collide and aggregate. This deposition process (gas to solid) is what creates the icy crystals that combine to make flakes and then fall to the ground when the air below is cold enough. This differs from condensing into liquid droplets, which would produce clouds made of liquid water rather than ice. It also isn’t about raindrops freezing on contact with the ground, which describes freezing rain or sleet rather than snow, and it isn’t about cloud droplets evaporating before reaching the ground, which would prevent precipitation from forming as snow. The key idea is direct gas-to-solid formation of ice crystals in cold clouds that grow and stick together to become snowflakes.

Snow forms when water vapor in the cold parts of the atmosphere deposits directly onto solid ice crystals, which grow into snowflakes as they collide and aggregate. This deposition process (gas to solid) is what creates the icy crystals that combine to make flakes and then fall to the ground when the air below is cold enough.

This differs from condensing into liquid droplets, which would produce clouds made of liquid water rather than ice. It also isn’t about raindrops freezing on contact with the ground, which describes freezing rain or sleet rather than snow, and it isn’t about cloud droplets evaporating before reaching the ground, which would prevent precipitation from forming as snow. The key idea is direct gas-to-solid formation of ice crystals in cold clouds that grow and stick together to become snowflakes.

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