Intrinsic properties are characteristics of a substance that do not change regardless of the amount of the substance present. These properties are inherent to the material itself and include attributes like density, melting point, and boiling point. For example, the density of gold remains constant whether you have a small nugget or a large bar. These properties are useful for identifying and classifying materials. Unlike extrinsic properties, which can vary with the quantity or conditions, intrinsic properties provide reliable information about the substance. Understanding these properties is essential in fields like chemistry and materials science.