* Condense means to change from a gas to a liquid.
* Vaporize (or evaporate) is the process of a liquid changing to a gas.
Think of it this way:
* Condense: Think of steam on a mirror. The water vapor in the air cools down and changes back into liquid water droplets.
* Vaporize: Think of a puddle drying up on a sunny day. The liquid water turns into water vapor and disappears into the air.
