Biology Required Practical: Respiration Rates

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Biology Required Practicals
GCSE/IGCSE Chemistry

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GCSE Biology Required Practical - Respiration Rates

Investigate the rate of respiration in living organisms.

  • Use of a simple respirometer to measure the effect of temperature on the oxygen consumption of some small organisms.
  • A simple respirometer can be made using a tube with soda lime, cotton wool and organisms with a capillary tube to coloured liquid.
  • Students can then track the progress of the liquid up the capillary tube over a set time. This experiment must be carried out using a water bath set at different temperatures.
  • Safety and ethical considerations must also be covered.

GCSE Biology practical - rate of respiration
GCSE Biology practical video will take you through the rate of respiration in living organisms.

Woodlice Respiration Required Practical | GCSE Biology (9-1)
This video will show how to set up the practical and also to analyse and interpret the results.

Respiration Experiments - GCSE Biology (9-1)
This video covers the following objectives.

  • Understand how the process of respiration produces ATP in living organisms.
  • Know that ATP provides energy for cells.
  • Practical: investigate the evolution of carbon dioxide and heat from respiring seeds or other suitable living organisms.

Check out the sample question and solution on Sample Assessment Material (page 42), paper 1BI0/1BH and 1BIO/1BF.

The figure shows the equipment used for measuring respiration in peas.

  • Respirometer A contains germinating peas.
  • Respirometer B contains peas that are not germinating.
  • Respirometer C contains glass beads.
    All three respirometers are placed in a water bath at 25°C for 30 minutes.

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