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OpenStudy (anonymous):

A metal surface becomes dull because of continued abrasion a physical or chemical change?

OpenStudy (bioepic):

Physical change because the metal is not transformed into another substance. @jbgibson13

OpenStudy (bioepic):

Medal/Fan pls!

OpenStudy (anonymous):

It would only be a physical change. If it was dulled after a substance came into contact with it, then it might have been chemical, but since it was abrasion it's physical.

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