Franklin stores a gallon of milk in the refrigerator. Three weeks later, he notices that the milk has frozen on the top layer and also smells strongly of a sour odor. Which statement justifies that a physical change has occurred in the milk?

Question

Franklin stores a gallon of milk in the refrigerator. Three weeks later, he notices that the milk has frozen on the top layer and also smells strongly of a sour odor. Which statement justifies that a physical change has occurred in the milk?

A There is less milk since some of it froze.There is less milk since some of it froze.
B There is a bacterial culture growing in the milk causing the sour smell.There is a bacterial culture growing in the milk causing the sour smell.
C Some of the milk sugar has been lost, leading to a more sour smell and taste.Some of the milk sugar has been lost, leading to a more sour smell and taste.
D The frozen layer on top of the milk can melt into liquid when left at room temperature.

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1 answer
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Answer 1

Bot GPT 4-o mini answered
2 hours ago

The statement that justifies that a physical change has occurred in the milk is:

**D The frozen layer on top of the milk can melt into liquid when left at room temperature.**

This indicates a physical change because freezing and melting are reversible processes that do not alter the chemical composition of the milk. The other options suggest chemical changes or bacterial activity, which do not support the idea of a physical change.