What is a physical change? Explain with example.

Explanation

### Step-by-Step Text Solution

**Step 1: Definition of Physical Change**
A physical change is a type of change that affects one or more physical properties of a substance without altering its chemical composition. This means that during a physical change, the substance may change its form or state, but it remains the same substance at the molecular level.

**Step 2: Characteristics of Physical Change**
In a physical change:
- The changes are usually reversible.
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