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)
Responses

The digesting of the food is a physical change.
The digesting of the food is a physical change.

The burning of the wood for the campfire is a physical change.
The burning of the wood for the campfire is a physical change.

The melting of the chocolate is a chemical change.
The melting of the chocolate is a chemical change.

The toasting of the marshmallow is a chemical change.
The toasting of the marshmallow is a chemical change.
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Answer 1

The correct statement identifying a part of the process as a physical or a chemical change is:

The toasting of the marshmallow is a chemical change.

This is because the toasting process involves the marshmallow undergoing a reaction that changes its chemical composition (e.g., caramelization, Maillard reaction), which is characteristic of a chemical change.

On the other hand, the melting of chocolate is a physical change, as it only alters the state of the chocolate without changing its chemical composition. Similarly, the burning of wood is also a chemical change. The digesting of food is a chemical change as well since it involves the breakdown of food substances.