When the temperature falls, water vapor can change into liquid water, a process called condensation.

Here's a breakdown:

* Water vapor: This is the gaseous form of water, invisible to the naked eye.

* Condensation: As the temperature decreases, the water vapor molecules slow down and lose energy. They clump together and form tiny water droplets, which we see as fog, clouds, dew, or rain.

Let me know if you'd like to know more about condensation!