Multiple choice What happens to the particles during condensation? Particles ............. ..gain heat energy, moving apart & become a gas. ..lose heat energy, moving closer together & become a liquid ..gain heat energy, moving apart & become a liquid. ..lose heat energy, moving closer together & become a solid. Reveal answer Fill a bubble to check yourself B Correct answer Explanation Condensation is the process where a gas cools down and changes into a liquid. During this phase change, the particles lose thermal energy, slow down, and move closer together.