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If the night is clear and the air is calm, which event is more possible?

Answer and explanation

Correct answer: Dew formation

Correct answer: B, dew formation. During a clear night, the ground loses heat by radiation without much cloud cover to reduce that cooling. When the air is calm, there is little mixing with warmer air above, so the surface and the thin layer of air touching it can become sufficiently cool. If this air reaches its dew point, water vapour condenses into small liquid droplets on grass, leaves, soil, or other cool surfaces. A is incorrect because a clear, calm night is not by itself a condition for a desert storm. C is incorrect because volcanic eruptions result from geological activity below the Earth’s surface, not ordinary night weather. D is incorrect because an undersea earthquake is also a tectonic event, unrelated to clear or calm air. Memory cue: clear sky allows cooling, and calm air allows dew to settle.

Related tags

DewClear SkyCalm AirCondensationForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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