Mixtures are all around you. In fact, it is difficult to find something that is not a mixture. Some common mixtures are pretty obvious, like dirt, chocolate chip cookies, and granite rock. These are called heterogeneous mixtures. In other mixtures, the particles are so tiny that they are hard to see without the aid of technology. Milk does not look like it has different parts, but it definitely does. Milk is composed of fats, sugars, and lots of water. These are called homogeneous mixtures.
Mixtures can be even further qualified by the size of their particles. Suspensions have the largest-sized particles. Their particles are large enough to see with your eyes. Solutions have the smallest particles. Their particles are so small that they do not even scatter a beam of light.