Solutions, Colloids, and Suspensions

Solutions, Colloids, and Suspensions are all types of mixtures, but there are important differences between the three.
Solutions are transparent; some might have a color, but you should still be able to see through them. A solution will not separate if left alone for a long period of time, and cannot be separated by normal filtration either. The particles have dimensions between 0.1 to 2 nanometers.

Colloids are mixtures as well. The particles that are in a colloid are usually larger clumps of molecules, which have dimensions between 2 to 1000 nanometers. The colloid is similar a solution in that it is homogeneous and isn't separated by filtration or when left alone. However, colloids are create a murky solution because the particles are large enough to disrupt light.

Suspensions contain the largest particles of the three, each particle being over 1000 nanometers. Suspensions separate on standing and will also separate by filtration. The particles are visible in suspensions much of the time.
Examples)
Solution --> Rubbing Alcohol (certain percentage alcohol, like 70%)
Colloid --> Ink, Paint
Suspension --> Oil in Water, Dust in Air