However, the amount of water vapor which the air can hold depends directly on the temperature.
Warm air can hold much more water vapor than cold air.
Consequently, if warm air containing a lot of water vapor rises up into the atmosphere, where it is cooled, it is forced to release all of the water vapor that it cannot hold in the form of gas. This is called condensation. As the water vapor in the atmosphere changes its state, water droplets and ice particles are formed. Then they become visible as little droplets of water, which we call cloud. Clouds are continuously in the process of evolving in the atmosphere.