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If a cloud has ice crystals and the lower air is above freezing, how can the form of precipitation change?

Answer and explanation

Correct answer: Ice crystals can melt into raindrops

Answer: A. Precipitation may begin as ice crystals in a cold cloud, but its form can change while it falls. The important clue is that the lower air is above 0°C, so the crystals pass through a melting layer. Heat from the surrounding air can melt the solid ice into liquid water. If the melted particles reach the ground as liquid drops, the precipitation is rain. The exact outcome also depends on the temperature and thickness of the lower layer, but melting is the key process described here. A is correct because ice crystals can become raindrops in above-freezing air. B is wrong because hail requires particular strong-cloud conditions and does not describe every ice crystal. C is scientifically impossible in this context. D is wrong because precipitation can continue while changing from solid to liquid. Memory cue: “Warm layer below = ice may melt into rain.”

Related tags

Ice CrystalsMelting LayerRainPrecipitation FormClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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