Concepts

Class 6
Chapter 6 Class 6 - Changes around us

A change which cannot be reversed to the original form is called irreversible change .

Here, we will take the example of the reversible change again to understand irreversible change

## Example 1 - Inflating balloon that it bursts

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

## Example 2 - Cutting the paper while making an airplane

1. Take a piece of paper.
2. Draw an airplane on it.
3. Cut it along the outline.
4. Paper which is cut once into a shape cannot be regained again.
5. Thus,this change is irreversible .

## Example 3 - Rolling and baking a chapati

1. Take a dough and make a ball out of the dough.
2. Now ,roll a chapati with this dough and bake it on a tawa .
3. Once the roti is baked it cannot be changed to a dough again.
4. Thus,this change is irreversible.

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