HAZMAT Operations WFD 45 Practice Test

Which process describes the transformation of a vapor in the air into a liquid?

Vaporization Condensation Deposition Boiling Point

Correct Answer:

Condensation

Explanation:

Condensation is the change from a gas to a liquid. When a vapor in the air loses energy—for example, by cooling or being compressed—its molecules move closer together until they form liquid droplets. This is what creates fog, dew, and clouds: water vapor in the air condenses into liquid water. Vaporization would be the opposite, liquid turning into gas (evaporation or boiling). Deposition is gas turning directly into a solid (like frost), and the boiling point is the temperature at which a liquid boils, not a process itself.

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