Differentiate between
Reversible and irreversible changes

Explanation

### Step-by-Step Solution:

1. **Definition of Reversible Changes**:
Reversible changes are changes that can be reversed, meaning the matter or substances involved can return to their original state after the change has occurred.

**Example**: Melting of wax. When wax is heated, it melts into a liquid. If the liquid wax is allowed to cool, it solidifies back into its original wax form.

2. **Characteristics of Reversible Changes**:
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