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What is the rainfall called that occurs when a warm, humid air mass strikes a high mountain barrier and rises?

Answer and explanation

Correct answer: Orographic rain

The correct answer is B, orographic rain. When moist air approaches a mountain, the mountain slope forces the air upward. As the air rises, pressure decreases, the air expands and cools, and its water vapour condenses into clouds. If condensation continues, rain falls on the windward side of the mountain. The descending air on the leeward side is often drier, producing a rain-shadow region. A, convective rain, results mainly from strong surface heating that makes warm air rise, not from a mountain barrier. C, cyclonic rain, is associated with rising air in low-pressure systems and fronts. D, artificial rain refers to human attempts to enhance rainfall and does not describe this natural mountain process. Memory cue: orographic means mountain-related; “oro” is linked with mountains.

Related tags

Orographic RainMountainsCondensationHydrological CycleThe Living WorldBiologyClass 11 Mcq

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