In general, cloud formation and or precipitation will occur....?

Question

a. when the absolute humidity is less than 75%

b. when the relative humidity reaches 100%

c. when the atmosphere is chilled to or below the dew point

d. both b and c

e. none of the above

Answer 1

The answer is (e)-none of the above.

The answer(d) is applicable only for cloud formation.For precipitation to occur,the tiny water (or ice) particles should combine together to become big rain drops so that they fall due to weight.This can happen under certain condition only.