Droplets forming on the underside of a pot lid while boiling indicate condensation.

• A. False
• B. True
• C. Condensation is the process of liquid turning into vapor
• D. Condensation cannot occur in a closed system

Answer: (B)

Droplets forming on the underside of a pot lid while boiling indicate condensation because condensation is the process of water vapor turning into liquid when it cools. As water boils, steam rises and meets the cooler lid surface; the vapor loses energy and changes back into liquid, forming droplets on the lid. This is exactly what condensation looks like in action. By contrast, the statement that condensation is liquid turning into vapor describes evaporation, the opposite process. And condensation can happen in a closed system—as steam encounters cooler surfaces inside the pot, it condenses there as well.