Multiple choice

Tube of a bicycle gets inflated when the air is filled in it. Why does this happen?

  1. Air is light

  2. Air flows anywhere

  3. Air exerts pressure

  4. Air expands on heating

  5. All of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tube of a bicycle gets inflated when the air is filled with it. This happens because air exerts pressure. Air exerts pressure because it is a matter and occupies space and has mass. Since, air is a mixture of different molecules they are pushed together causing pressure with each other.

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