Question

this is a soil sample. like this soil sample, most soils contain some combination of clay, silt, and sand. because they have different particle sizes, clay, silt, and sand can be physically separated using a sieve. describe and classify this soil sample. this soil sample is composed of only one type of atom and cannot be chemically decomposed, so it is an element. this soil sample is composed of atoms of two or more different elements in a fixed ratio and can be chemically decomposed, so it is a compound. this soil sample is composed of two or more substances that can be physically separated and are evenly distributed, so it is a homogeneous mixture. this soil sample is composed of two or more substances that can be physically separated but are not evenly distributed, so it is a heterogeneous mixture.

Explanation:

The soil sample contains clay, silt, and sand which are different substances. These can be physically separated (using a sieve as mentioned). Also, looking at the image, the components are not evenly distributed (different colors and textures are visible in patches). A heterogeneous mixture is defined as a combination of two or more substances that can be physically separated and are not uniformly distributed. An element is a pure substance with only one type of atom (not the case here as there are multiple substances). A compound has elements in a fixed ratio (not applicable as soil components are in variable ratios and physically mixed). A homogeneous mixture would have a uniform composition throughout (which the soil sample does not).

Answer:

This soil sample is composed of two or more substances that can be physically separated but are not evenly distributed, so it is a heterogeneous mixture.