Both suspensions and colloids are heterogeneous mixtures. Define and characterize a colloid, listing similarities and differences to a suspension. Give several examples of colloids.

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