A mixture is defined as a physical combination of two or more substances. Mixtures are typically organized into two different categories: homogeneous or heterogeneous. Homogeneous means uniform or the same through out and an example of this would be sugar water. Once the sugar is dissolved into the water you can no longer see the sugar and the water separately; they become one or uniform. A heterogeneous mixture is the opposite: you can see all the components separately when combined together. An example of this would be Italian salad dressing. When you shake the bottle everything mixes up, but you are still able to see the garlic, oil, seasonings, etc. Therefore, chocolate milk would be a homogeneous mixture. Since there are two components, chocolate and milk, and when they are mixed together there is no obvious separation of the two substances, everything is uniform.
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