A(n) ____ is any material, such as sand, crushed steel grit, aluminum oxide, silicon carbide, or crushed slag, used for cleaning, sanding, smoothing, or material removal.

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An abrasive is a material, often a mineral, used to wear away the surface of something softer by friction. It is commonly used for cleaning, sanding, smoothing, or material removal on various surfaces, which matches the description given.

A(n) ____ Is Any Material, Such as Sand, Crushed Steel