Which of the following best describes what happens during condensation?

• A. A solid changes into a liquid.
• B. A gas changes into a liquid.
• C. A liquid changes into a solid.
• D. A liquid changes into a gas.

Answer: (B)

Verified step by step guidance

1. Understand that condensation is a phase change process involving a change in the state of matter.
2. Recall the definitions of phase changes: melting (solid to liquid), freezing (liquid to solid), vaporization/evaporation (liquid to gas), and condensation (gas to liquid).
3. Identify that condensation specifically refers to the process where a substance changes from the gas phase to the liquid phase.
4. Recognize that this process typically occurs when a gas is cooled or compressed, causing the gas particles to lose energy and come closer together to form a liquid.
5. Therefore, the best description of condensation is 'A gas changes into a liquid.'