Question

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.

Which statement correctly identifies a part of this process as a physical or a chemical change?

A. The melting of the chocolate is a chemical change
B. The digestion of the food is a physical change
C. The toasting of the marshmallow is a chemical change
D. The burning of the wood for the campfire is a physical change

Answer 1

The answer is C. The toasting of the marshmallow is a chemical change.

Why?

Based on the other options:

A.) The melting of the chocolate ISNT a chemical change. It's a physical change.

B.) The digestion of food is NOT a physical change. It's a chemical change.

D. The burning of the wood for the campfire is NOT a physical change. It's a chemical change.

Physical Change: Doesn’t change the composition of the matter. However, its physical appearance and properties can change.

Chemical Change: During chemical changes, the matter that you start with isn’t the matter you end up with.