Which of the following is an example of condensation?

• A. Liquid water evaporating into water vapor
• B. Ice melting into liquid water
• C. Water vapor forming liquid droplets on a cold surface
• D. Salt dissolving in water

Answer: (C)

Verified step by step guidance

1. Understand the definition of condensation: it is the process where a gas changes into a liquid when cooled or compressed.
2. Analyze each option to identify which involves a gas turning into a liquid:
3. Option 1: Liquid water evaporating into water vapor is evaporation, which is liquid to gas, so not condensation.
4. Option 2: Ice melting into liquid water is melting, which is solid to liquid, so not condensation.
5. Option 3: Water vapor forming liquid droplets on a cold surface is gas turning into liquid, which matches the definition of condensation.