Pure Substances can be defined as elements.
Matter can be defined as Pure Substances but can also be Mixtures.
A mixture is a substance made by mixing other substances together.
A mixture can be defined as Homogeneous.
Homogeneous consists of parts all of the same kind. On Homogeneous you can't see the mixed substances.
A Mixture can also be defined as Heterogeneous
Heterogeneous can be defined as diverse in character or content or denoting a process involving substances in different phases (solid, liquid, or gaseous). For example you mixe different ingredients and you can sometimes still see some of the ingredients.
Heterogeneous can be defined as Suspension.
A suspension is a heterogeneous mixture in which solute-like particles settle out of a solvent-like phase some time after their introduction.
Heterogeneous can also be defined as colloids.
A colloid is a homogeneous, noncrystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance. Colloids include gels, sols, and emulsions; the particles do not settle and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.