Final answer:
Both the copper statue turning green and deep-frying chicken are chemical changes. The statue's color change is due to a reaction with the air, while deep-frying chicken involves heat-induced chemical reactions in the food's components.
Step-by-step explanation:
Both a copper statue turning green and deep-frying chicken involve chemical changes. In the case of a copper statue, the green patina that forms is a result of a chemical reaction between copper and the elements in the air, such as oxygen, and possibly carbon dioxide if the copper carbonate forms. This is known as verdigris and represents the corrosion of the metal.
When deep-frying chicken, the heat causes the proteins and fats to undergo a series of chemical reactions, like Maillard browning and lipid oxidation, changing the structure and flavors of the foods, which makes this process a chemical change as well.
Therefore, the correct answers would be that both are chemical changes. It should be noted that while heating is involved in deep-frying chicken, it is not necessary for the copper statue to turn green; thus, 'Both are caused by heating' is only applicable to deep-frying chicken and not to the copper statue.