Here's why:

* Gas: Gas molecules have high kinetic energy, meaning they move around freely and are far apart.

* Cooling: When a gas cools, the molecules lose kinetic energy and slow down.

* Condensation: As the molecules slow down, their attractive forces become stronger, causing them to clump together. This clumping results in a change of state from a gas to a liquid.

Think about water vapor in the air. When it cools, it condenses into tiny water droplets, forming clouds or dew.