What is the term for the process by which a gas becomes a liquid?

What is the term for the process by which a gas becomes a liquid?

• A. Condensation
• B. Evaporation
• C. Sublimation
• D. Precipitation

Answer: (A)

Condensation is the process by which a gas becomes a liquid. When a gas cools or is compressed, its particles lose energy and slow down enough to come together and form a liquid droplet. This is why you see dew on grass or fog on a mirror after a warm, humid room meets a cooler surface. Evaporation is the opposite change (liquid to gas), sublimation is solid to gas, and precipitation refers to water falling to Earth's surface from the atmosphere (a result of cooling and condensation in clouds, not the direct gas-to-liquid change).

Condensation is the process by which a gas becomes a liquid. When a gas cools or is compressed, its particles lose energy and slow down enough to come together and form a liquid droplet. This is why you see dew on grass or fog on a mirror after a warm, humid room meets a cooler surface. Evaporation is the opposite change (liquid to gas), sublimation is solid to gas, and precipitation refers to water falling to Earth's surface from the atmosphere (a result of cooling and condensation in clouds, not the direct gas-to-liquid change).