How is rainfall caused? Explain it with the help of a diagram.
When the hot air rises, it reaches high in the atmosphere where it cools down due to low temperature. Thus, the water present in the form of water vapours condenses into tiny droplets of water or crystals of ice. In due course of time, these tiny droplets of water join together and form clouds.
Due to further cooling, these tiny condensed droplets join and form larger droplets. When these droplets of water become too heavy to float into the air, they fall down on Earth as rainfall or snow fall, depending upon the atmospheric temperature of the region.