Which material is a material is mixture

A heterogeneous mixture is a mixture of two or more chemical substances (elements or compounds). Examples are: mixtures of sand and water or sand and iron filings, a conglomerate rock, water and oil, a portion salad, trail mix, and concrete (not cement).

Explanation:

it would only be the stuff in module eight so you need to study all the lessons in that you also could check the flvs

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