Which of the following are physical changes and which are chemical changes ?
Making a cake

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks whether making a cake is a physical change or a chemical change.

2. **Defining Physical and Chemical Changes**:
- **Physical Change**: A change that affects one or more physical properties of a substance but does not change its chemical composition. Examples include melting, freezing, and dissolving.
- **Chemical Change**: A change that results in the formation of new chemical substances. This involves a chemical reaction where reactants are transformed into products, and these changes are usually irreversible.

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