respiration Checklist

• different ways by which organisms obtain nutrients

  Autotrophic - makes its own food

  Heterotrophic - getting its food from other plants or animals

  Saptotrophic - take in nutrients in solution form from dead & decaying matter
• Define aerobic respiration

  Release of chemical energy in cells in the presence of oxygen
• Define Anarobic Respiration

  Release of chemical energy in cells without oxygen .
• Word equation for aerobic respiration

  glucose + oxygen - carbon dioxide + water + energy
• Compare burning with the process of respiration

  • Both respiration and combustion produce energy.
  • Both respiration and combustion give out carbon dioxide as the end product.
• Experiments to investigate respiration in different organisms

  Peas experiment

  Germinating peas turned bromothyl blue the indicator yellow as they were respiring a lot and creating lots of carbon dioxide
• Role of yeast in bread making and alcohol production

  Yeast feeds on sugars during bread and alcohol production . This is called fermentation
• What 2 things can carbon dioxide be detected using

  Bromothyl blue and limewater
• Process of yoghurt making

  Yogurt forms when bacteria ferment the milk sugar, known as lactose, into lactic acid. The lactic acid makes the milk more acidic (lower pH) causing the proteins to coagulate.