Question

1. give an example of a physical and a chemical change that occurs when you toast a marshmallow and make a smore. (p. 6)

Explanation:

A physical change is when the marshmallow melts. This is a physical change because it changes state (from solid to liquid) but its chemical composition remains the same. A chemical change is when the marshmallow is toasted to a brown/black color. This is a chemical change as new substances are formed due to the heat - induced chemical reactions (such as the Maillard reaction).

Answer:

Physical change: Melting of marshmallow. Chemical change: Toasting (browning/blackening) of marshmallow.