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Does anyone know methods that scientists use to determine if a change was physical or chemical?

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If there is no change in the chemical properties, it is a physical change.
Methods they use to determine physical changes:
-State in Matter change
-Difference of Size
If there is a change in the chemical composition, it is a chemical change.
Methods they use to determine chemical changes:
-Bubbling
-Color change
-Solid formation from mixing
-Heat given off
-New substance with different properties.
User Ross Gibson
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