Biology Required Practical: Respiration Rates

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.

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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.

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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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