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Which statement is correct?
  • A
    Mist and haze only differ by different values of visibility.
  • B
    Fog can be supercooled and can also contain ice crystals.
  • C
    Fog and haze do not occur in the tropics.
  • D
    Mist and haze consist of water droplets.

FOG is defined as a cloud of small water droplets that is near ground level and sufficiently dense to reduce horizontal visibility to less than 1 000 metres.

If temperatures are cold enough, we might observe the following:

  • Freezing fog - When fog forms in temperatures that are below freezing, the tiny water droplets in the air remain as liquid. They become supercooled water droplets remaining liquid even though they are below freezing temperature.
  • Ice fog - Is a type of fog consisting of fine ice crystals suspended in the air. It occurs only in cold areas of the world, as water droplets suspended in the air can remain liquid down to −40 °C

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