Final answer:
Chemical changes cannot be reversed by physical changes. They involve the formation of a different substance with different properties and are harder to reverse than physical changes. Physical changes, on the other hand, are easily reversible.
Step-by-step explanation:
Chemical changes cannot be reversed by physical changes.
Chemical changes occur when bonds are broken and/or formed between molecules or atoms, resulting in the formation of a different substance with different properties. These changes are typically harder to reverse than physical changes.
Physical changes, on the other hand, involve small changes in energy and can be easily reversed. Examples of physical changes include phase transitions (such as melting, freezing, vaporization) and dissolution.