Final answer:
A chemical change transforms a material into a new substance with different properties, due to the reconfiguration of atoms as chemical bonds are broken or formed.
Step-by-step explanation:
When a material undergoes a chemical change, it transforms into a new substance with different properties. This happens because the chemical bonds between atoms are broken or formed, leading to a reconfiguration of the atoms into new substances with differing properties. Examples of chemical changes include the burning of gasoline, the souring of milk, and the rusting of iron. Unlike physical changes, which may involve changes in size, state, or shape without altering the molecular structure, chemical changes result in the formation of entirely new substances.