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Why is a dark cloud not always a guarantee of heavy rainfall?

Answer and explanation

Correct answer: Because droplet growth and air conditions are also needed along with appearance

Answer: A. A cloud may look dark because it is optically thick or dense, so less sunlight passes through it and less light reaches an observer below. This appearance suggests substantial cloud depth or water and ice content, but it does not by itself prove that large, falling drops have formed or that the lower air will allow them to reach the surface. Heavy rainfall depends on processes such as droplet or ice-particle growth, cloud depth, upward and downward air motion, and evaporation below the cloud. B is wrong because dark clouds can contain water. C is wrong because clouds are not made of rock. D is wrong because cirrus clouds are generally high, thin ice clouds and are not defined by being dark. Memory cue: dark appearance is evidence about light transmission, not a guarantee about rainfall at the ground.

Related tags

Dark CloudsRainfall UncertaintyDroplet GrowthCloud OpacityClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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