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

What is the approximate percentage of nitrogen in air?

Right Option : D
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Question : 2

The dust particles move in a ____________________ way in a beam of light .

Right Option : B
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Question : 3

Which of the following is the correct order of components of air in terms of their composition in air?

Right Option : C
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Explanation
 
 
 


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