Final answer:
The chocolate milk and milkshake can be distinguished by their density and physical consistency. While color is similar due to chocolate content, the milkshake's inclusion of ice cream leads to a higher density and a thicker consistency compared to chocolate milk.
Step-by-step explanation:
To distinguish between a chocolate milkshake and chocolate milk using common properties of matter, we consider their color and density. Both these products would likely have a very similar color due to the presence of chocolate; however, their densities can vary. Density is an intensive property of matter, which means it does not depend on the amount of the substance present. It's the ratio of mass to volume, and while both chocolate milk and milkshakes are primarily liquid, the milkshake may have a higher density due to the addition of ice cream or other ingredients that incorporate air and increase its volume without increasing its mass proportionally.
Another physical characteristic to consider is the phase or state of matter. Both are liquids, but a milkshake typically has a thicker consistency and may behave slightly more like a non-Newtonian fluid due to its viscosity. This is still a physical property of the matter, as the composition - primarily milk and chocolate - doesn't change, merely the consistency and the flow behavior under stress does. To put it succinctly, these differences are all examples of physical properties that help in identifying and distinguishing substances.