Density measurement is the process of determining how much mass is contained in a given volume of a substance. It is typically expressed in units like grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³). To measure density, one can use the formula: density = mass/volume. This can be done using a balance to find mass and a graduated cylinder or other measuring device to find volume. Different methods can be used for density measurement, depending on the material. For liquids, a hydrometer can be employed, while solids may be measured using water displacement. Understanding the density of materials is important in various fields, including engineering, chemistry, and material science, as it helps in identifying substances and predicting their behavior in different conditions.