Which term describes the change from a gas to a liquid?

Which term describes the change from a gas to a liquid?

• A. Vaporization
• B. Conduction
• C. Condensation
• D. Convection

Answer: (C)

Condensation is the change from a gas to a liquid. It happens when a gas loses enough energy—usually by cooling or compression—so its molecules slow down and cling together to form a liquid, releasing energy in the process. This is why dew forms on grass or why clouds appear as water vapor cools and condenses. Vaporization is the opposite (liquid to gas), while conduction and convection are heat transfer methods, not phase changes.

Condensation is the change from a gas to a liquid. It happens when a gas loses enough energy—usually by cooling or compression—so its molecules slow down and cling together to form a liquid, releasing energy in the process. This is why dew forms on grass or why clouds appear as water vapor cools and condenses. Vaporization is the opposite (liquid to gas), while conduction and convection are heat transfer methods, not phase changes.