
A key factor needed for precipitation to occur is
(a) updraft motion is relatively thick clouds.
(b) a condensation rate that exceeds the evaporation rate.
(c) condensation nuclei.
(d) All of these.

The correct option for the statement “A key factor needed for precipitation to occur is”.
Answer to Problem 6RAT
The correct option for the statement “A key factor needed for precipitation to occur is” is an option (d).
Explanation of Solution
Precipitation is the droplet formation of water at the dew point temperature. The precipitated water droplets take the form of snow or dew and complete the water cycle.
During the process of precipitation, the first precipitated water droplets condense on the particles in the atmosphere like dust or smoke and form like a condensing nucleus.
Due to the gravitational effect and the collision between the particles, the falling velocity of the precipitated water is more than the updraft speed of the clouds.
The rate of condensation, if greater than the rate of evaporation of water, then more precipitation occurs and the water droplets fall as melt, snow, or rain.
Conclusion:
Therefore, the correct option for the statement “A key factor needed for precipitation to occur is” is an option (d).
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