Explain why burning of wood and cutting it into small piece are considered as two different types of changes.

Explanation

To explain why burning of wood and cutting it into small pieces are considered as two different types of changes, we need to understand the concepts of physical and chemical changes.

### Step-by-Step Solution:

1. **Definition of Changes**:
- There are two main types of changes: physical changes and chemical changes.
- Physical changes involve changes in the shape, size, or state of a substance without altering its chemical composition.
- Chemical changes involve a transformation that results in the formation of one or more new substances, with different properties from the original substances.
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