Density, a fundamental property of matter, is defined as mass per unit volume. Determining this property for a rock involves finding both its mass and its volume, then applying a simple calculation. The result, typically expressed in grams per cubic centimeter (g/cm) or kilograms per cubic meter (kg/m), provides valuable information about the rock’s composition and origin. For example, a piece of granite with a mass of 500 grams and a volume of 200 cm would have a density of 2.5 g/cm.
Knowledge of a rock’s density is crucial in various fields. In geology, it aids in identifying rock types and understanding geological formations. In engineering, it’s essential for assessing the stability of foundations and slopes. Furthermore, density measurements contribute to mineral exploration, helping to locate valuable ore deposits. Historically, Archimedes’ principle, a method for determining volume by displacement, has been instrumental in accurately calculating the density of irregular objects, including rocks.
