AIR AROUND US


  
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1.The bubbles contains .

2. The components of air which are harmful to human beings are and .

3. is present in largest amount in air.

4. Air is not required in movement of .

5. The cycle of consumption of oxygen by respiration and its release by photosynthesis is called .

6. When the concentration of carbondioxide increases in air it leads to .

7. If there will be no on earth, things will burn fast.

8. is intake of oxygen and giving out carbondioxide.

9. protects us from he ultravoilet rays of the sun.

10. causes excess of carbondioxide which may lead to suffocation.