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How can the presence of water droplets and ice crystals in mixed clouds affect precipitation?

Answer and explanation

Correct answer: It can support both ice-crystal growth and droplet coalescence

Answer: A. A mixed cloud contains both supercooled liquid droplets and ice crystals in a cold environment. Water vapour can deposit onto ice crystals, allowing them to grow. Ice particles may also collide with droplets and become larger. At the same time, in suitable warmer portions of the cloud, liquid droplets can collide and coalesce into larger drops. These combined growth processes can help particles reach a size at which they fall as snow, rain, or another form after passing through different temperature layers. A is correct because both ice-crystal growth and droplet coalescence may contribute. B is wrong because mixed clouds can actively produce precipitation. C is wrong because the cloud still contains moisture. D is wrong because mixed clouds are not permanently warm. Memory cue: “Mixed cloud = ice growth plus possible droplet merging.”

Related tags

Mixed CloudsIce CrystalsCoalescencePrecipitation GrowthClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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