What do these two changes have in common? boiling sugar to make caramel a copper statue turning green Select all that apply. Both are only physical changes. Both are chemical changes. square Both are caused by cooling.

The question is asking about the commonality between two processes: boiling sugar to make caramel and a copper statue turning green. <br /><br />1. Boiling sugar to make caramel: This is a chemical change. When sugar is boiled, it undergoes a chemical reaction that changes its structure and properties, resulting in caramel. This change is not reversible, which is a characteristic of a chemical change.<br /><br />2. A copper statue turning green: This is also a chemical change. The green color on a copper statue is due to a chemical reaction between copper and the elements in the air, such as oxygen and moisture. This reaction forms a layer of copper carbonate, which is green in color. This change is also not reversible, which is another characteristic of a chemical change.<br /><br />Therefore, the commonality between these two processes is that both are chemical changes.