Final answer:
When water evaporates, it absorbs heat energy and cools the surrounding air.
Step-by-step explanation:
When water evaporates, it absorbs heat energy and cools the surrounding air. Evaporation is a process in which liquid water changes into water vapor, and this phase change requires energy in the form of heat. As the water molecules gain energy, they escape from the liquid and enter the gas phase, taking away heat energy from their surroundings. This is why evaporation is a cooling process, and why we feel cooler when we sweat on a hot day.