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simple diffusion, facilitated diffusion, and osmosis (water)
These processes involve the movement of molecules across a semi-permeable membrane. Diffusion is the passive movement of molecules from an area of high concentration to an area of low concentration. Osmosis is the diffusion of water molecules across a selectively permeable membrane. Facilitated diffusion is the passive transport of molecules across a membrane with the help of specific proteins.
evaporation , condensation , persipitation , run-off
Diffusion and Osmosis
osmosis and diffusion