What is an example of cooling by evaporation?

Cooling by evaporation occurs when a liquid turns into vapor, absorbing heat from the surroundings in the process. This is a fundamental principle that helps regulate temperature in many natural and technological systems.

When we sweat during physical activity, the sweat (which is primarily composed of water) evaporates from the skin’s surface, taking heat away from the body and thereby cooling us down. The evaporation of sweat requires energy, which is drawn from the body heat, resulting in a drop in skin temperature and helping to maintain overall body temperature during exertion.

The other options provided do not involve evaporation as a cooling mechanism. Radiation refers to heat transfer through electromagnetic waves, while convection involves the transfer of heat through fluid motion. Condensation is the process where vapor turns into liquid, releasing heat rather than facilitating cooling. Thus, sweating is indeed a prime example of cooling through evaporation.