https://www.khanacademy.org/science/mh-grade-6-science-2026/x261ad4222d9320ed:properties-of-substances/x261ad4222d9320ed:density/v/density 2026-06-30T17:20:49.845080165Z Density Density is a measure of how much mass is packed into a given volume. This is determined by the mass and number of particles occupying a given space. The relative density of a substance may be used to predict whether it will float on another substance. For instance, anything with a greater density than water sinks in water, but anything with a lower density than water floats on water. Mahesh Shenoy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Density Density is a measure of how much mass is packed into a given volume. This is determined by the mass and number of particles occupying a given space. The relative density of a substance may be used to predict whether it will float on another substance. For instance, anything with a greater density than water sinks in water, but anything with a lower density than water floats on water. https://cdn.kastatic.org/ka-youtube-converted/w1P3q2GiTx4.mp4/w1P3q2GiTx4.mp4 278 Density 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/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