heterogeneous mixture
not uniform in composition, but proportions of its components vary throughout the sample
dispersed media
consists of two media (gas, liquid or solid) that do not mix; contains discrete elements of one medium which are dispersed in a continuous second medium
dispersion
mixture in which components are dispersed in a continuous phase of different composition, where at least one of the phases consists of finely divided phase domains
soil
natural body consisting of layers that are primarily composed of minerals
topsoil
the upper layer of soil