https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:mass-weight-and-density/x0e04e0cb682fb793:density/v/density-conceptual 2025-02-13T17:59:34.347326855Z Density (conceptual) Density reveals how much mass is packed into a given volume. Different substances have different densities. Water’s density is 1.0 g/cm³, meaning any material with a density higher than this will sink in water, while lower densities float. Since each substance has a consistent density, this property helps identify materials and explain why some objects are “light” or “heavy” for their size. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/8ae75a73-6da6-42a1-905c-ec2f08726afe_1280_720_base.png Density (conceptual) Density reveals how much mass is packed into a given volume. Different substances have different densities. Water’s density is 1.0 g/cm³, meaning any material with a density higher than this will sink in water, while lower densities float. Since each substance has a consistent density, this property helps identify materials and explain why some objects are “light” or “heavy” for their size. https://cdn.kastatic.org/ka-youtube-converted/d7VPJ4DYwQQ.mp4/d7VPJ4DYwQQ.mp4 442 Density https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:mass-weight-and-density/x0e04e0cb682fb793:density/a/density 2026-04-29T10:50:35.589391704Z Learn and try: Density Learn about density as the relationship between mass and volume and how to calculate and compare the densities of different materials. Explore how density explains why some objects float while others sink and how density varies with temperature. article https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:mass-weight-and-density/x0e04e0cb682fb793:density/v/density-equation 2025-02-13T17:59:34.347326855Z Density equation Density measures how tightly matter is packed into a given space, calculated by dividing mass by volume (D = m/V). Knowing a substance’s density can help identify it. For irregular objects, scientists often measure volume using water displacement, where the volume change in water shows the object’s volume. Combining this measurement with the object’s mass provides a way to identify materials accurately regardless of their shape. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/3f882a3e-fe05-47b2-97df-a67b4da3a00d_1280_720_base.png Density equation Density measures how tightly matter is packed into a given space, calculated by dividing mass by volume (D = m/V). Knowing a substance’s density can help identify it. For irregular objects, scientists often measure volume using water displacement, where the volume change in water shows the object’s volume. Combining this measurement with the object’s mass provides a way to identify materials accurately regardless of their shape. https://cdn.kastatic.org/ka-youtube-converted/rW_33U7-8u8.mp4/rW_33U7-8u8.mp4 388 Density https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:mass-weight-and-density/x0e04e0cb682fb793:density/e/understand-density 2026-04-29T10:50:35.589391704Z Understand: Density Check your understanding of density in this set of free, standards-aligned practice questions. Allen Ruch exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:mass-weight-and-density/x0e04e0cb682fb793:density/e/apply-density 2026-04-29T10:50:35.589391704Z Apply: Density Apply your understanding of density in this set of free, standards-aligned practice questions. Allen Ruch exercise https://www.khanacademy.org/math/geometry/hs-geo-solids/hs-geo-density/v/volume-density 2022-09-10T02:03:40.164764806Z Volume density Volume density is the amount of a quantity (often mass) per unit of volume. Density=Quantity/Volume Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/3eaa48a6-20ee-4658-b11f-0e5ad0ab68bb_1280_720_base.png Volume density Volume density is the amount of a quantity (often mass) per unit of volume. Density=Quantity/Volume https://cdn.kastatic.org/ka-youtube-converted/QoKiCWCsSCo.mp4/QoKiCWCsSCo.mp4 243 Density