This is true by definition. Heterogeneous materials are made of more than one thing (a material made of only one thing is homogeneous). So if it's made of more than one thing, there must be a mixture of two or more things. So, it's a mixture.
heterogeneous mixture
compound. B. substance. C. heterogeneous. D. homogeneous.
A type of mixture in which different materials are spread out unevenly is known as a heterogeneous mixture. It is a combination of substances with no uniform composition or properties.
A basketball is a heterogeneous mixture because it is composed of different materials that are not uniformly distributed throughout the object. The materials, such as rubber and various synthetic fibers, are visibly distinguishable within the basketball.
Trail-mix is a heterogeneous mixture: It contains visually different solid materials.
This is a mixture of materials which can be distinguished from each other.
Toothpaste is always a mixture.
heterogeneous
A "heterogeneous mixture", which alternatively be called an "inhomogeneous" mixture.
Heterogeneous
I consider cement as a heterogeneous mixture.
Cement is a heterogeneous mixture because it is composed of different components, such as limestone, clay, and other materials, that are not uniformly distributed throughout the mixture.