Milk is a heterogeneous mixture that contains different types of particles in different phases. Due to the sizes of the particles in milk and the way they are dispersed, the particles do not easily settle out. What can milk be best described as?
Milk is best described as a colloidal dispersion.
In a solution the particles are physically combined with each other and a beam of light will pass though the liquid without being scattered.
In a colloidal dispersion, the particles do not settle out and a beam of light will be scattered as it passes through the dispersion.
In the picture above, a beam of light is scattered by the colloidal particles on the right but not by the true solution on the left.