Which term best describes a material that has a uniform composition throughout?

The term that best describes a material with a uniform composition throughout is "homogeneous." In materials science, a homogeneous material consists of identical constituents that are distributed evenly, resulting in consistent physical and chemical properties throughout the entire sample. This uniformity means that no distinct regions or phases can be identified.

In contrast, a composite refers to a material made from two or more constituent materials with significantly different physical or chemical properties, which remain separate within the final material. A binary material typically refers to a system composed of two distinct components, but these may not necessarily be uniformly mixed. A mixture generally consists of two or more substances that are combined, but can have varying compositions throughout, leading to regions that may have different characteristics.

Thus, homogeneous is the most accurate term to describe a material that maintains the same composition throughout its entirety.