Air


 
 
Concept Explanation
 

Air

Air is All Around Us  :

  A thick blanket of air called the atmosphere, surrounds our Earth. Air is also present in thing which seem to be empty

Composition Of Air

It contains mainly nitrogen and oxygen it also contains carbon dioxide noble gases water vapour, dust particles and traces of other gases.

Nitrogen And Oxygen :  Air contains about 78% nitrogen and 21% oxygen . Oxygen in air supports burring whereas nitrogen does not.

Carbon Dioxide :  Air contains about 0.03% of carbon dioxide .Plant and animals take in oxygen and give out carbon dioxide during respiration

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Sample Questions
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Question : 1
Colnumn IColumn II
A. large O_2P. 78%
B. large CO_2Q. 0.95%
C. large N_2R. 21%
D. Inert GasesS. 0.035%
Right Option : B
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Question : 2

How many gases does air contain?

Right Option : D
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Question : 3

Air is made up of __________________

Right Option : C
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Explanation
 
 
 


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