Which of the following is an example of a physical change?

• A. Melting of ice
• B. Baking a cake
• C. Burning of wood
• D. Rusting of iron

Answer: (A)

Verified step by step guidance

1. Understand the difference between physical and chemical changes: A physical change affects the form or appearance of a substance but does not change its chemical composition, while a chemical change results in the formation of new substances with different properties.
2. Analyze each option to determine if the chemical composition changes: For example, melting ice changes water from solid to liquid but remains H\_2O, so no new substance is formed.
3. Consider baking a cake: This involves chemical reactions that produce new substances, so it is a chemical change.
4. Consider burning wood: This process produces ash, gases, and other new substances, indicating a chemical change.
5. Consider rusting of iron: Rusting forms iron oxide, a new compound, so it is a chemical change.