Is Rusting Only a Chemical Change?
Rusting is indeed a chemical change rather than a physical change. This is because rusting involves a chemical reaction between iron, oxygen, and water, resulting in the formation of iron oxide, commonly known as rust.

Chemical Change Characteristics:
- Involves a change in chemical composition
- New substances are formed
- Cannot be reversed by physical means
- Energy is usually absorbed or released

Rusting as a Chemical Change:
- Rusting involves the oxidation of iron in the presence of oxygen and water
- This reaction leads to the formation of iron oxide, which has a different chemical composition than the original iron
- The process of rusting is irreversible and cannot be undone by simply reversing the conditions that caused it

Physical vs. Chemical Changes:
- Physical changes only affect the physical properties of a substance, such as shape, size, or phase, without altering its chemical composition
- Chemical changes, on the other hand, result in the formation of new substances with different chemical properties

Conclusion:
In conclusion, rusting meets all the criteria of a chemical change, as it involves the formation of a new substance with different chemical properties. Therefore, rusting is rightly classified as a chemical change rather than a physical one.