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

The percentage amount of which of these gases in air is the least ?

Right Option : B
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Explanation
Question : 2

Plants use _________________________  for preparing food which in turn gives food to the entire Living world

Right Option : B
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Explanation
Question : 3

What is air in motion called as?

Right Option : B
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Explanation
 
 
 


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