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If moist air keeps rising on a windward slope for a long time, why can rainfall persist?

Answer and explanation

Correct answer: Continuous uplift maintains cooling and condensation

Direct answer: A is correct. A windward slope forces incoming moist air to rise, producing orographic uplift. As the air rises, it expands and cools. Cooling can bring the air to saturation, so water vapour condenses into cloud droplets or ice particles. If moist air continues to arrive and rise, this cooling and condensation process can continue, allowing precipitation to persist on the windward side. The rainfall is not caused by the mountain creating water; the mountain provides the lifting mechanism. B is wrong because a mountain redirects and raises air rather than ending it. C is wrong because rising moist air is not automatically dry; it may lose some moisture as precipitation. D is wrong because moisture is essential for forming precipitation. The opposite leeward side may be drier because descending air warms, but that is not the reason for windward persistence. Memory cue: windward rising air is cooled air, and cooled moist air can keep producing cloud and rain.

Related tags

Orographic RainfallContinuous UpliftWindward SlopeClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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