Which statement describes a heterogeneous mixture?

• A. Not uniform; you can see the parts
• B. Uniform mix; can't see different parts
• C. A pure substance with a single composition
• D. A solution where the solute is dissolved

Answer: (A)

A heterogeneous mixture is not uniform throughout; its different components remain distinct, so you can see the separate parts. Think of a salad, a rock with different minerals, or sand with grains of different colors—the mixture isn’t the same everywhere and you can spot the different substances.

That’s why the statement describing it as not uniform and visible parts is the best fit. In contrast, a uniform mixture has a smooth, even composition you can’t distinguish by eye, a pure substance is only one kind of material, and a solution is a uniform mixture where the dissolved parts blend together so you can’t see them.