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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?
A
a chemical change because the marshmallow changed in taste, color and smell
B
no change because the marshmallow is not a new substance
с
only a physical change because the marshmallow changed size
D
a chemical change because the marshmallow only changed in pH level
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