Which term describes water changing from gas to liquid?

Which term describes water changing from gas to liquid?

• A. Evaporation
• B. Freezing
• C. Melting
• D. Condensation

Answer: (D)

Condensation is the process where water vapor in the air loses enough energy to become a liquid. When air containing moisture cools, the fast-moving water molecules slow down and start sticking together, forming droplets. This is why you see dew on grass or foggy windows—the vapor has cooled and turned into liquid water. By contrast, evaporation is the change from liquid to gas, melting is solid to liquid, and freezing is liquid to solid, so they describe different directional changes in the state of matter.

Condensation is the process where water vapor in the air loses enough energy to become a liquid. When air containing moisture cools, the fast-moving water molecules slow down and start sticking together, forming droplets. This is why you see dew on grass or foggy windows—the vapor has cooled and turned into liquid water.

By contrast, evaporation is the change from liquid to gas, melting is solid to liquid, and freezing is liquid to solid, so they describe different directional changes in the state of matter.