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If fog is dense only in an industrial area and lighter outside, which local cause is possible?

Answer and explanation

Correct answer: More particles increased the number of condensation nuclei

Correct answer: A. Industrial activity can release smoke, dust and other fine particles into the air. These particles may act as condensation nuclei, meaning surfaces on which water vapour can condense into tiny droplets when the air is sufficiently moist and cool. More droplets in a local area can make fog appear denser and can reduce visibility. A does not mean pollution alone guarantees fog; moisture, cooling and suitable air movement are also needed. B is wrong because an industrial area still contains air. C is too absolute and false: pollution does not always remove moisture. D ignores a plausible local influence. Memory cue: more nuclei can mean more droplets, but moisture and cooling remain essential.

Related tags

Industrial FogCondensation NucleiAir PollutionVisibilityForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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