To study the Role of Air in each Activity
1)Earth is surrounded by a big blanket of
  

2)Cold air is ______ than hot air
  

3)Which is the second abundant gas in the air
  

4)Plants use ______ to make their food and release _______
  

5)Plants release _____ in the process of photosynthesis
  

6)Which of the following gases supports burning?
  

7)The major components of air are
  

8)Oxygen and Carbon dioxide are replaced in nature by
  

9)Which of the following are properties of air?
  

10)The composition of Nitrogen in air is