Chapter 4: Changes around us

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Q
Changes around us

Question:

A drawing sheet changes when you draw a picture on it. Can you reverse this change?

Answer:

Reversible changes are the changes in which the substance regains its original shape or state. If we draw a picture on a drawing sheet using oil paint or a pen, we cannot erase that picture, and hence it is an irreversible change. However, if we use a pencil to draw a picture on a drawing sheet, we can easily erase that picture using an eraser and hence, it represents a reversible change.


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