Cud sum1 pleez xplain 2 me wot causes FOG?

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  • Anonymous
    1 decade ago
    Best answer

    when cold air meets with warm evaporated water condenses and becomes heavier , and so it drops to the ground forming fog .

  • 1 decade ago

    Fog can be considered a cloud at ground level. The processes forming it, however, are usually different from those that form clouds. Like clouds, fog is made up of condensed water droplets which is the result of the air being cooled to the point (actually, the dewpoint) where it can no longer hold all of the water vapor it contains. For clouds, that cooling is from the rising of air parcels, which cools from expansion. For fog, which occurs next to the ground, there are usually other reasons for this cooling. For instance, rain can cool and moisten the air near the surface until fog forms. Also, infrared cooling of a cloud-free, humid air mass at night can lead to fog formation - this is called "radiation fog". Radiation fog is most common in the fall, when nights get longer, and land and water surfaces that have warmed up during the summer are still evaporating alot of water into the atmosphere. Finally, a warm moist air mass blowing over a cold surface (usually snow or ice) can also cause fog to form-this is called "advection fog".

  • 1 decade ago

    Fog can be considered a cloud at ground level. The processes forming it, however, are usually different from those that form clouds. Like clouds, fog is made up of condensed water droplets which is the result of the air being cooled to the point (actually, the dewpoint) where it can no longer hold all of the water vapor it contains. For clouds, that cooling is from the rising of air parcels, which cools from expansion. For fog, which occurs next to the ground, there are usually other reasons for this cooling. For instance, rain can cool and moisten the air near the surface until fog forms. Also, infrared cooling of a cloud-free, humid air mass at night can lead to fog formation - this is called "radiation fog". Radiation fog is most common in the fall, when nights get longer, and land and water surfaces that have warmed up during the summer are still evaporating alot of water into the atmosphere. Finally, a warm moist air mass blowing over a cold surface (usually snow or ice) can also cause fog to form-this is called "advection fog".

  • Anonymous
    1 decade ago

    Cold air mixes with the warmth given off by the ground and condensates water vapour in the air creating fog.

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  • 1 decade ago

    FOG: Fog is a cloud that touches the ground.

    Fog is distinct from mist only in its density.

    Its defined as clouds which reduce visibility to less than 1km.

    Mist is defined as clouds which reduce visibility to less than 2km.

    Source(s): wikipedia.org/wiki/fog
  • finger
    Lv 4
    3 years ago

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  • Anonymous
    1 decade ago

    Hot front meets cold front causes the air to condense, I think.

  • 1 decade ago

    something like when hot and cold meet a bit like condensation i think

    check a dictionary

  • 1 decade ago

    A cloud which is touching the ground.

  • 1 decade ago

    high pressure keeping water vapour low

    and other things like lack of wind etc

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