1. Physical changes only change the appearance of a substance, not its chemical composition.
2. Chemical changes cause a substance to change into an entirely substance with a new chemical formula.
3. Chemical changes are also known as chemical reactions.
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Answers & Comments
1. Physical changes only change the appearance of a substance, not its chemical composition.
2. Chemical changes cause a substance to change into an entirely substance with a new chemical formula.
3. Chemical changes are also known as chemical reactions.