Density is an intrinsic property of a substance. This means that it does not depend on the amount of the substance present. Density is defined as the mass per unit volume of a material, and it remains constant regardless of the size or shape of the sample.
For example, if you have a block of iron and cut it into smaller pieces, each piece will have the same density as the original block. This is because the mass and volume of the iron are both reduced proportionally, so the ratio (density) stays the same.
In contrast, extrinsic properties, such as weight or volume, do depend on the amount of the substance. These properties change when the size or quantity of the sample changes.
Understanding whether a property is intrinsic or extrinsic is important in fields like chemistry and physics, as it helps in identifying and characterizing materials.