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Roughly how far below the freezing level can snow typically fall before melting completely?

  • A.several kilometres
  • B.a few metres
  • C.it melts instantly at the freezing level
  • D.a few hundred metres

Answer: D

The distance depends on the flake size, the humidity and the lapse rate below. Larger aggregates survive furthest because they carry more mass relative to their surface. Humidity below the melting level matters as much as temperature.

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