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If surface heating is strong but the air is dry why will convectional clouds remain limited?

Answer and explanation

Correct answer: Because dry air has little moisture for condensation

Answer: A. Strong surface heating warms the air near the ground, making it less dense so that it can rise; this supplies the lifting needed for convection. However, rising air must also contain enough water vapour. As the parcel rises, it expands and cools. If it contains little moisture, it may cool without reaching saturation, so condensation remains limited and the convective cloud cannot grow much. The complete chain is heating, uplift, cooling, saturation, condensation, and cloud growth; dry air interrupts the chain at saturation and condensation. B is wrong because warming unsaturated air generally lowers its relative humidity rather than automatically saturating it. C is wrong because heating usually promotes, not prevents, uplift. D is wrong because convection commonly develops over strongly heated surfaces. Memory cue: convection needs both an engine (heating) and fuel (moisture).

Related tags

Convectional CloudsAtmospheric MoistureSurface HeatingCondensationClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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