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State whether the following is true or false.
Adding condensation nuclei to a cloud always increases the precipitation it produces.

  • A.False only at small scales
  • B.True
  • C.False
  • D.True only at large scales

Answer: C

More nuclei give smaller droplets, which coalesce less efficiently and delay the onset of rain. The net effect on total precipitation depends on the cloud type and can go either way. Shallow warm clouds and deep convection respond in opposite directions.

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