Osmosis

• Osmosis is the movement of water molecules across a partially permeable membrane from a region of higher water concentration to a region of lower water concentration
• 1. A partially permeable membrane is just one with very small holes in it, meaning only very small molecules can fit through and big ones can't
• 1. The water molecules actually pass both ways through the membrane during osmosis. This happens because water molecules move about randomly all the time
• As there are more water molecules on one side that on the other. There's a steady net flow of water into the region with fewer water molecules. Which means the strong sugar solution get more dilute. The water acts like its trying to 'even up' the concentration gradient either side of the membrane
• Osmosis is a type of diffusion - passive movement of water particles from an area of higher water concentration to an area of lower water concentration