Answer:
An example of a chemical change is when copper mixes with the air to form a greenish copper carbonate. A chemical change is a type of change that involves a chemical reaction, in which the substances involved in the change are transformed into new substances with different chemical properties. In this case, when copper mixes with the air, it reacts with carbon dioxide and moisture to form a new substance called copper carbonate. This substance has a different color and chemical properties than the original copper, which indicates that a chemical change has occurred. In contrast, the other options you provided do not involve chemical reactions and are not examples of chemical changes.
Step-by-step explanation: