A heterogeneous mixture is best described as which?

• A. Uniform composition throughout
• B. Only solids
• C. Mixed components that are not uniform throughout
• D. Always easy to separate

Answer: (C)

In a heterogeneous mixture the components are not uniformly mixed, so you can often spot different substances or phases within the sample. That matches describing it as mixed components that are not uniform throughout. You can see distinct parts, like a rock with different minerals or a salad with vegetables and dressing. By contrast, a homogeneous mixture has uniform composition everywhere, so you wouldn’t distinguish parts. Heterogeneous mixtures can involve solids, liquids, or gases, and they aren’t always easy to separate—some parts stay mixed unless you use specific methods.