NCERT Question 5 - Chapter 6 Class 6 - Changes around us

Last updated at July 13, 2026 by

Give examples to explain the difference between changes that can or cannot be reversed.

 

Answer:

Reversible change

Irreversible Change

1. INFLATION AND DEFLATION OF A BALLOON

  • Take a balloon  and blow it.
  • Make sure it does not burst.
  • The balloon changes its shape and size because of the air blown into it.
  • Now ,release the air which is filled in the balloon.
  • You will notice that the balloon comes back to its original shape.
  • The change is reversible.

 

1. BURSTING A BALLOON

  • Take a Balloon.
  • Blow it to the full size and tie its mouth with a string.
  • Prick it with a pointed pencil.
  • The balloon burst.
  • Now the balloon which has  burst cannot be blown again.
  • This change is irreversible.

 

  • MAKING PAPER PLANE
  • Take a piece of paper
  • Fold it to make an airplane
  • Shape and size of the paper changes
  • When you are bored, you can open the paper and it wil l come to its original shape and size
  • So. The change here is reversible.

 

  1. CUTTING AIRPLANE SHAPE OUT OF PAPER
  • Take a piece of paper
  • Draw a airplane on it
  • Cut it along with the outline
  • Paper which is cut once along its shape cannot be regained again.Thus,this change is irreversible

 

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