Diffusion and osmosis are passive processes, meaning they don't need energy to occur. Both are spontaneous processes. ... In osmosis, water freely moves across a membrane from an area of low solute concentration, or hypotonic solution, to one of high solute concentration, or hypertonic solution.
osmosis is the movement of water molecules. similarities: the similarities in osmosis and diffusion is that they both equalize the concentration of two solutions into a membrane. they both work together to move water molecules from a area of high concentration to a area of low concentration.
