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Would you please help our readers distinguish between water vapor, mist, fog, and clouds? I myself was under the impression that "steam" was at least 100 °C [212 °F]. --Ed Poor Talk 08:52, 16 March 2008 (EDT)

100 °C [212 °F] is the boiling point of water. Steam can be less then that but I'm not sure of the science. (Hey it's CP what do we care about science anyway :) DLerner 09:25, 16 March 2008 (EDT))

  • Steam: Invisible gas state of water.
  • Water vapor: Exactly the same as steam, in scientific terms. In practical use, steam is reserved for hot vapor, while water vapor is used for cold. Yes, it can be below the boiling point - familiarise yourself with the concept of partial pressure.
  • Mist: Suspension of water droplets in air. Formed when steam condenses rapidly on meeting cold air, or under some other circumstances.
  • Cloud: May be mist, may be suspended ice particles.
  • Fog: Like cloud, but lower. NewCrusader 20:24, 17 August 2008 (EDT)