Question

on a camping trip, marta roasts a marshmallow in the campfire. the marshmallow grows, and then turns black. marta notices that the roasted marshmallow smells and tastes differently than the uncooked marshmallows. what change has taken place, and how does marta know? choose one option a a chemical change because the marshmallow changed in taste, color and smell b no change because the marshmallow is not a new substance c only a physical change because the marshmallow changed size d a chemical change because the marshmallow only changed in ph level

Explanation:

A chemical change occurs when a new substance is formed. Roasting a marshmallow changes its taste, color, and smell, indicating a new substance is formed. Physical changes (like change in size) don't form new substances. pH level change (option D) isn't indicated here.

Answer:

A. a chemical change because the marshmallow changed in taste, color and smell