Final answer:
Specific gravity helps measure the density of a liquid relative to water. It provides important information about the density and quality of a substance.
Step-by-step explanation:
Specific gravity is a measurement that provides information about the density of a liquid relative to water. It is the ratio of the density of the liquid to the density of water.
By measuring the specific gravity of a liquid, we can determine if it is denser or less dense than water. This information is useful in various applications, such as determining the concentration of solutes in a solution or assessing the quality of a substance.