Civil Services Prep

Prelims MCQ · Geography

Consider the following conditions:

  • A layer of air with a temperature above freezing overlies a sub-freezing layer near the ground.
  • Raindrops or melted snow leave the warmer layer, enter the colder layer and solidify before reaching the surface.
  • The resulting particles are small ice pellets, not larger than the raindrops from which they formed.

Which one of the following conclusions is most appropriate?

  1. The particles constitute snowfall because they originate directly as hexagonal ice crystals in the upper air.
  2. The particles are hailstones because all rounded ice particles necessarily possess concentric layers.
  3. The precipitation is sleet, formed by freezing raindrops or refreezing melted snow in cold near-surface air.
  4. The precipitation is rainfall because it passed through a layer with temperatures above freezing.
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