Our atmosphere is a mixture of gases, water vapour, and dust particles. The major gases present in our atmosphere are Nitrogen (78%), Oxygen (21%), Carbon dioxide (0.03%), Argon (0.93%) and remaining (0.04%). There are five layers of atmosphere, namely: Troposphere Stratosphere Mesosphere Thermosphere, and Exosphere

Ozone layer, which is found in the lower parts of stratosphere, protects our earth from the harmful ultraviolet radiations of the Sun.

You all must have realized that the atmospheric conditions of the place where we live in, keep on changing every day. It is the weather, which keeps on changing every day. Weather is the state of the atmosphere at any particular place or time. It can be hot, cold, windy, cloudy or humid. It generally changes from day to day.

Climate refers to all the weather conditions for a particular place over a long period of time.

There are many factors on which weather of a place depends upon. Some of these are temperature, air pressure, wind and moisture. Wind is the air in motion. It is produced by the uneven heating of the surface of the earth by the Sun. Winds can be broadly classified as: Permanent winds Seasonal winds, and Local winds Air always contains water vapour. The amount of water vapour in the air is known as humidity. It varies from one place to another at different point of time. As the air gets warmer, its capacity to hold the water vapour increases, so it becomes more and more humid.

Precipitation is the release of moisture after the condensation of water vapour in the atmosphere. It occurs when tiny cloud droplets join together to form large water drops.

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