Final answer:
Condensation is the process of a liquid changing into a gas due to a decrease in temperature or an increase in pressure.
Step-by-step explanation:
Condensation is the process of a liquid changing into a gas due to a decrease in temperature or an increase in pressure. When a gas cools down, the molecules lose energy and slow down, eventually coming closer together and forming a liquid. This can be observed when water vapor in the air is cooled enough to form liquid water, such as on the outside of a cold beverage glass or in the form of fog.