The most common mechanism of cloud formation is:
A)adding water vapor to the air.
B)mixing warm moist air with cold air.
C)lowering the air temperature to the dew point by adiabatic cooling of rising air.
D)none of the above

Question

Quizplus · Accepted Answer

The most common mechanism of cloud formation is the cooling of rising air due to adiabatic expansion which results in a decrease in temperature and an increase in relative humidity until it reaches the saturation point (dew point) where water vapor condenses into visible cloud droplets. Adding water vapor to the air (option A) can increase humidity but will not necessarily lead to cloud formation unless the air is cooled to the dew point. Mixing warm moist air with cold air (option B) can sometimes cause clouds to form, but it is not the most common mechanism of cloud formation.

The Most Common Mechanism of Cloud Formation Is