Prepared by - ஆ.கார்த்திக்ராஜா, புவனகிரி , கடலூர்
சரியான விடை அட்டையை எடுத்து,வினாவிற்கு அருகே உள்ள பெட்டியில் பொருத்துக:
விளையாடி முடித்த பின்இவற்றை ஏடுகளில் எழுதிப்பார்க்கவும்..
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1.Extraction of minerals from the earth is called mining.
2.Nitrogen is released by automobiles.
3.Air pollution is caused by both natural & manmade activities.
4.The word pollution is derived from the Greek word "Polluere".
5.Releasing substances like chemical compounds into the atmosphere is known as air pollution.
6.Planting more trees can reduce the amount of oxygen in the air.
7.By using CFL bulbs we can save energy.
8.Switch on fans & lights when you are not using them.
9.When animal habitat is changed they face extinction.
10.Chloroflurocarbon is used in Tube lights.