Final answer:
Baking cookies is a chemical change as it involves a reaction that forms new substances. It is not a physical change because it involves a change in composition.
Step-by-step explanation:
Baking cookies is a chemical change because the ingredients undergo a reaction to form new substances. In this case, the heat causes the dough to undergo a chemical reaction, resulting in a new substance - a delicious cookie. Additionally, the cookies undergo a thermal change as the heat causes them to cook and change their state from dough to solid cookies.
However, baking cookies is not a physical change. Physical changes only involve a change in the physical properties of a substance, such as shape, size, or phase, without forming new substances. Baking cookies involves a chemical reaction and a change in the composition of the dough, making it a chemical change.
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