Diffusion

• Diffusion is the movement of particles from an area of high concentration to low concentration.
• The rate of diffusion depends on temperature, surface area, and concentration gradient.
• Osmosis is the diffusion of water across a partially permeable membrane.
• Grade 9 Definition=

  Diffusion is the net movement of molecules or ions.

  Down a concentration gradient (from an area of high concentration to an area of lower concentration)...

  Through a partially permiable membrane. Until dynamic equilibrium is reached.