Diffusion.

• What is the definition of Diffusion?


  Diffusion is the spreading out of particles from an area of higher concentration to an area of lower concentration.
• What stages of matter can differentiation happen in?


  liquids and gasses.
• What makes the diffusion rate? 


  The bigger the concentration gradient.

  The higher the temperature - the particles have more energy so move around faster.
• What substances can diffuse through cell membrane through diffusion? 


  Dissolved substances
• what small molecules can diffuse through a cell membrane?


  Oxygen, Glucose, amino acids and water.
• What types of molecules can’t diffuse through?

  Starch and Proteins.
• What increases the rate of diffusion on cell membranes? 


  A larger surface area.