diffusion and osmosis

• diffusion

  substance that move from an area oh higher concentration to an area of lower concentration, no energy needed
• diffusion

  occurs in both gasses and liquids

  
• diffusion can also take place through partially permeable membranes

  
• factor effecting rate of diffusion- concentration gradient

  difference of concentration between two places

  
• factor effecting rate of diffusion- temperature

  higher temperature gives the particles more energy which makes hem move around faster, diffusion will happen more quickly

  
• factor effecting rate of diffusion- surface area


  larger surface area= higher rate of diffusion

  
• osmosis (diffusion of water molecules)

  osmosis is the movement of water molecules across a partially permeable membrane from a region of higher water concentration to a region of lower water concentration
• water concentration


  the amount of water, as compared to other molecules, like sugars or salts (solutes) that are dissolved in the water