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Why can dew disappear during the day after forming?

Answer and explanation

Correct answer: Because it can evaporate due to solar heating

Correct answer: B. Dew forms when a surface cools enough for nearby moist air to reach its dew point, causing water vapour to become liquid droplets. After sunrise, solar radiation warms the ground, leaves, roofs, and other surfaces. The droplets then receive heat and can change from liquid water back into water vapour; this process is evaporation. Moving air can also help remove the moist air above the surface, making disappearance faster, but the basic reason in this question is daytime heating. Option A is wrong because dew does not turn into stone. Option B is correct because warming supplies energy for evaporation. Option C is wrong because leaves do not eat water droplets, although plants may absorb some water. Option D is wrong because air always contains some water vapour, even when it is relatively dry. Memory cue: night cooling forms dew; daytime heating usually removes it.

Related tags

DewSolar HeatingEvaporationDew PointForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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