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OpenStudy (anonymous):
A metal surface becomes dull because of continued abrasion a physical or chemical change?
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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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