Biology ISA on diffusion

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  • Created by: Mariya_99
  • Created on: 17-11-13 15:15
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  • Biology ISA Diffusion
    • Living things and Diffusion
      • Gaseous Exchange: when oxygen diffuses from alveoli into the blood
      • Intestines to Blood
    • Risk Assesment
      • Acid is corrosive so wear goggles and gloves
      • Test tubes are fragile and may shatter so clean up any messes if they break
    • Fair Test
      • Repeat the experiment for each concentration 3 times and take an average result
      • Use same amount of acid
      • All soloutions will be at room temperature
  • Hypothesis: The greater the concentration of acid the faster the rate of diffusion
    • Biology ISA Diffusion
      • Living things and Diffusion
        • Gaseous Exchange: when oxygen diffuses from alveoli into the blood
        • Intestines to Blood
      • Risk Assesment
        • Acid is corrosive so wear goggles and gloves
        • Test tubes are fragile and may shatter so clean up any messes if they break
      • Fair Test
        • Repeat the experiment for each concentration 3 times and take an average result
        • Use same amount of acid
        • All soloutions will be at room temperature
  • Explanation: Particles move from an area of high concentraion to an area of low concentration "down a concentration gradient. So the higher the concentration the larger the gradient do therefore the greater the rate of diffusion
    • Factors Effecting Diffusion
      • Temperature: more heat means the particles hav more kinetic energy
      • Liquid or Gas: liquid diffuses faster than gases
    • Concentration: high concentration means there are more particles so the rate of reaction increases
      • Factors Effecting Diffusion
        • Temperature: more heat means the particles hav more kinetic energy
        • Liquid or Gas: liquid diffuses faster than gases
    • Use the same size agar jelly

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