Exhaled breath from your mouth can condense when
A) it is very cold.
B) it is very warm and humid.
C) the addition of water vapor from your breath causes the air's relative humidity to exceed 100 percent.
D) all of the above

Question

Quizplus · Accepted Answer

Exhaled breath contains water vapor. When the temperature of the air is very cold, the water vapor in your breath condenses and forms a fog-like cloud that is visible when exhaling. When the air is warm and humid, the breath may not condense as readily. However, if the air's relative humidity is already high, the addition of water vapor from your breath may cause the humidity to exceed 100 percent, resulting in visible condensation. Therefore, all the options mentioned in the question are correct.

Exhaled Breath from Your Mouth Can Condense When