How does rain form?

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Multiple Choice

How does rain form?

Rain forms when water vapor in a cloud condenses into droplets around tiny condensation nuclei. These droplets grow by colliding and combining with each other (coalescence) until they become large enough that gravity pulls them downward faster than the air can hold them up, overcoming drag and any updrafts. In warm clouds this collision-coalescence process is the typical pathway to rain. In colder clouds, ice crystals can form and later melt as they descend into warmer air, producing rain. The other options describe frost formation, deposition as ice, or evaporation rather than the condensation and growth of droplets that leads to rainfall.

Rain forms when water vapor in a cloud condenses into droplets around tiny condensation nuclei. These droplets grow by colliding and combining with each other (coalescence) until they become large enough that gravity pulls them downward faster than the air can hold them up, overcoming drag and any updrafts. In warm clouds this collision-coalescence process is the typical pathway to rain. In colder clouds, ice crystals can form and later melt as they descend into warmer air, producing rain. The other options describe frost formation, deposition as ice, or evaporation rather than the condensation and growth of droplets that leads to rainfall.

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