While camping, you make a snack over a campfire. You roast a marshmallow over the campfire until it is browned and put it between some chocolate and graham crackers. When you take a bite, you notice that the chocolate and marshmallow have melted slightly.

Question

Which statement correctly identifies a part of this process as a physical or a chemical change?
(1 point)
• The melting of the chocolate is a chemical change.
• The toasting of the marshmallow is a chemical change.
• The digesting of the food is a physical change.
• The burning of the wood for the campfire is a physical change.

Answer 1

The correct statement is:

• The toasting of the marshmallow is a chemical change.

When the marshmallow is toasted over the campfire, it undergoes a chemical change due to the heat causing caramelization and the breakdown of sugars, resulting in a change in its chemical structure and flavor. The other options are incorrect as described. Melting chocolate is a physical change, digesting food involves multiple chemical changes, and burning wood is a chemical change as well.