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If droplets formed on a cold surface freeze immediately, what condition does this indicate?

Answer and explanation

Correct answer: Surface temperature is around or below freezing point

Answer: A. Liquid droplets freeze when the temperature of the droplets and their immediate surface is at or below the freezing point, under the conditions described. Thus, immediately freezing droplets indicate a very cold surface, around or below 0°C for fresh water. This is consistent with a frost-like deposit rather than ordinary liquid dew. A is correct because it links the observed change of state—liquid to solid—with the necessary thermal condition. B is the opposite: a hot surface would encourage evaporation, not immediate freezing. C is wrong because droplets themselves demonstrate that water is present, and moisture was needed for them to form. D is unsupported and does not explain freezing. The key clue is “freeze immediately”: identify the solid-state condition before considering the source of the moisture.

Related tags

FrostFreezing PointCold SurfaceDewForms Of Condensation: DewFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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