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

Which of the following gases in the air has least percentage?

Right Option : A
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Question : 2

About  __________ of air contain oxygen.

Right Option : B
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Question : 3

Over 90% of the air made up of these two gases. These gases are:

Right Option : B
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