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Which air condition is needed for snowfall to reach the ground?

Answer and explanation

Correct answer: Temperature along the path remains low enough so snowflakes do not fully melt

The correct answer is A. Snow forms as ice crystals or snowflakes in cold clouds, but the temperature of the entire falling path determines what reaches the ground. If a snowflake passes through a sufficiently warm layer, it can melt into rain or partly melt into sleet. For snowfall to reach the surface, the air must remain cold enough, or warm layers must be too thin for complete melting. B is wrong because a hot ground does not preserve snow. C is wrong because water vapour is needed for cloud ice and snow formation. D is wrong because warm, dry air encourages melting or sublimation. Cue: snow survives when the fall path stays cold.

Related tags

SnowfallTemperature ProfilePrecipitation TypeClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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