The molecular movement begins to slow down. Intermolecular interactions increase. When the liquid has cooled sufficiently, it will begin to freeze and form a solid.
It freeseez.
It decreases
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this is known as liquifaction if the gas is cooled to liquid.
When water vapor is cooled, it loses energy and condenses back into liquid water. This process is called condensation.
When a liquid is cooled, the rate of evaporation slows down
It is cooled to liquid and fed back into the boiler for reheating.
It's called condensation when vapour cools and turns into liquid.
I assume you mean what happens to the molecules... They slow down due to the loss of kinetic energy when the liquid is cooled. When they are sufficiently cooled as to cause freezing, that's a different story.
The definition of glass is a super cooled liquid. Any liquid that is super cooled takes on the properties of glass. Glass as you think of it is just super cooled silica. What happens is that it is cooled so quickly that it doesn't actually undergo a phase change back to a solid. In reality glass is just an incredibly slow moving liquid.
when water vapour is cooled it condenses and falls as rain
When cooled enough it will condense into a liquid. The required temperature changes with the substance.