Question

milk spoiling is an example of which type of change?
your answer

what type of change is mixing air into egg whites to make frosting?
your answer

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Explanation:

Milk spoiling involves a chemical reaction where bacteria break down lactose and other components, changing the chemical composition of the milk. Mixing air into egg whites to make frosting is a physical change as it only alters the physical state (foaming due to air incorporation) without changing the chemical structure of the proteins in the egg whites.

Answer:

Milk spoiling: Chemical change.
Mixing air into egg whites to make frosting: Physical change.