Osmosis: Osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell's partially permeable membrane.
Diffusion: The process of movement of a substance (solid, liquid, or gas) from the region of higher concentration to the region of lower concentration so as to spread uniformly is called diffusion.
Tyndall effect: The Tyndall effect is the phenomenon in which the particles in a colloid scatter the beams of light that are directed at them.
or the scattering of a beam of light by a medium containing small suspended particles.
Brownian motion: Brownian motion refers to the random movement displayed by small particles that are suspended in fluids.