https://www.khanacademy.org/science/biology/membranes-and-transport/diffusion-and-osmosis/v/diffusion-video 2023-09-14T11:22:40.102153098Z Diffusion - Introduction Diffusion occurs when particles move from an area of high concentration to low concentration, creating a concentration gradient. This natural, energy-free process occurs due to the random movement of particles, with a higher chance of particles moving from the high concentration side. Over time, this leads to an equilibrium state with equal concentrations on both sides. Sal Khan video https://cdn.kastatic.org/googleusercontent/RUQQq8sEkvIHMaAACUfO9mwKcYl24deX2nahzhdiPcW8Hu02regQ_phJzKBOoUg3VABgzF1J8ziAQfdkVITX558 Diffusion - Introduction Diffusion occurs when particles move from an area of high concentration to low concentration, creating a concentration gradient. This natural, energy-free process occurs due to the random movement of particles, with a higher chance of particles moving from the high concentration side. Over time, this leads to an equilibrium state with equal concentrations on both sides. https://cdn.kastatic.org/ka-youtube-converted/a_Y9wBQ610o.mp4/a_Y9wBQ610o.mp4 367 Diffusion https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/membrane-transport/a/phet-simulation-exploring-diffusion 2025-04-01T19:47:44.987278167Z PhET simulation: Exploring diffusion Follow the link to dive deeper into diffusion using an interactive PhET simulation! article https://www.khanacademy.org/science/ap-biology/x16acb03e699817e9:simulations/x16acb03e699817e9:phet-simulation-exploring-diffusion/e/phet-simulation-exploring-diffusion 2026-03-11T05:00:37.141016324Z PhET simulation: Exploring diffusion Use a PhET simulation to test your knowledge of diffusion with this set of free, standards-aligned practice questions. Megan Cohn exercise