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10 July, 04:01

Which of the following is a physical change?

Adding an acid to milk to form sour cream

Adding enzymes to milk to form cheese

Adding bacteria to heated milk to form yogurt

Adding sugar to milk to form sweetened milk

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  1. 10 July, 06:51
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    Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.
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