Write a note about rain

Rain is liquid water in the form of droplets that have condensed from atmospheric water vapor and then become heavy enough to fall under gravity. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth.

When water bodies are heated during the day a large amount of water evaporates and goes into the air. Some amount of water vapour also gets into the atmosphere because of various biological activities. This air also gets heated. The hot air rises up carrying the water vapour with it. As the air rises it expands and cools. This cooling causes the water vapour in the air to condense in the form of tiny droplets. This condensation of water is facilitated if some particles could act as the ‘nucleus’ for these drops to form around. Once the water droplets are formed they grow bigger by the ‘condensation’ of these water droplets. When the drops have grown big and heavy they fall down in the form of rain. Rainfall patterns are decided by the prevailing wind patterns. In large parts of India rains are mostly brought by the southwest or north-east monsoons