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GCSE Biology Osmosis Coursework By Chatham South School Potato and Osmosis Investigation Introduction into Osmosis Osmosis is a unique type of diffusion. Diffusion is basically the movement of particles from areas where there are a groups of them to places where there are fewer a bit like someone releasing methane, you do not smell it straight it but it gradually spreads out then it is equally balanced having reached equilibrium Nice air Bad smell Osmosis is defined as the movement of water molecules from a region that they are highly concentrated to a region in which they are less concentrated. This movement only takes place through a partially permeable membrane such as a cell wall, which lets small molecules go through like water but does not let bigger molecules to pass through like sugar. The water molecules pass both ways. In this diagram, the water will more likely go right. Diagram of Osmosis Plant cells...

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