Transcription of Air - NCERT
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Air - NCERT
4 Air Do you know? Our earth is surrounded by a huge blanket of air called atmosphere. All living beings on this earth Carbon dioxide depend on the atmosphere for their survival. It released in the provides us the air we breathe and protects us from atmosphere creates a the harmful effects of the sun's rays. Without this green house effect by blanket of protection, we would be baked alive by the trapping the heat heat of the sun during day and get frozen during radiated from the night. So it is this mass of air that has made the earth. It is therefore temperature on the earth liveable. called a greenhouse gas and without it the COMPOSITION OF THE A TMOSPHERE.
The cyclonic winds caused tidal waves that swept 20 km. inland and brought massive destruction to the coastal areas. The 7 to 10 m high tidal wave intruded suddenly and caused massive damage to the standing paddy crops. Destruction caused by a cyclone Fig. 4.4: Major Pressure Belts and Wind System
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