Air moving under the fan is cooler than air that is still. The evaporation of sweat absorbs heat from the skin. Water vapor from the fan condenses on the skin. The fan speeds convection currents in the air.
I gave my students this multiple choice question: After a soccer game, Brittany sat under a fan because she was hot. Under the fan, she felt cooler than before. Which explains why Brittany felt cooler under the fan?

Only one answer is correct among these 4 choices:
- Air moving under the fan is cooler than air that is still.
- The evaporation of sweat absorbs heat from the skin.
- Water vapor from the fan condenses on the skin.
- The fan speeds convection currents in the air.

Could you tell me which one is correct?

The evaporation of sweat absorbs heat from the skin.