Final answer:
Pure substances can be elements or compounds, while mixtures can be homogeneous or heterogeneous.
Explanation:
To classify substances, we need to understand the concepts of pure substances and mixtures. A pure substance can be either an element or a compound, while mixtures can be homogeneous or heterogeneous. Examples include white wine (homogeneous mixture), mercury (element), ranch-style salad dressing (heterogeneous mixture), and table sugar (compound).
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