Water condenses when it changes from a gaseous state (water vapor) to a liquid state. This happens when the temperature of the water vapor decreases to the point where the water molecules slow down and are able to form bonds with each other.

Here are some common scenarios where water condensation occurs:

* Cooling of a surface: When warm, moist air comes into contact with a cold surface (like a glass of iced tea or a cold window pane), the air cools down. The water vapor in the air condenses into tiny water droplets on the surface, forming condensation.

* Formation of clouds: As warm, moist air rises in the atmosphere, it cools. The water vapor in the air condenses into tiny water droplets or ice crystals, forming clouds.

* Dew formation: During the night, the ground cools down faster than the air. The water vapor in the air condenses on the cool ground, forming dew.

* Fog formation: When the air near the ground cools down to the dew point, the water vapor condenses, forming fog.

The specific temperature at which water vapor condenses is called the dew point. The dew point depends on the amount of moisture in the air. The more moisture in the air, the higher the dew point.