Final answer:
Baking a cake results in a chemical change, as evidenced by the transformation of ingredients into a cake with new properties, similar to other reactions like burning a candle or natural gas.
Step-by-step explanation:
When you bake a cake, a chemical change has occurred. This statement is true. In the process of baking, the ingredients in the cake mix undergo various chemical reactions. For instance, the baking powder reacts, producing carbon dioxide that helps the cake to rise. The proteins and starch in the flour change structurally, which gives the cake its texture. Similarly, the oven's heat causes chemical changes in bread dough to make fresh bread, which are indeed chemical changes.
Examples of chemical changes include the burning of a candle, where wax burns to form water and carbon dioxide, and the burning of natural gas in a furnace, transforming methane and oxygen into water and carbon dioxide. Such reactions not only change the appearance but also create different substances with new chemical properties. Therefore, baking a cake, like these examples, results in a change of the molecular structure of the ingredients, which is characteristic of a chemical change.