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Science & Plants for Schools (SAPS)
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Investigating Factors Affecting Photosynthesis Using Leaf Discs
One of a series of resources from Science & Plants for Schools (SAPS) investigating key topics in plant biology. An enjoyable and reliable practical activity allowing students to compare factors affecting photosynthesis. Possible investigations could include the rate of photosynthesis in sun and shade plants, and at different light intensities. Students punch out small discs from leaves, and float them in a syringe of sodium hydrogen carbonate solution. Once gas is evolved by photosynthesis, the leaf discs rise and fall.
The resource is suitable for use at Key Stage Three, GCSE and A level.
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Please be aware that resources have been published on the website in the form that they were originally supplied. This means that procedures reflect general practice and standards applicable at the time resources were produced and cannot be assumed to be acceptable today. Website users are fully responsible for ensuring that any activity, including practical work, which they carry out is in accordance with current regulations related to health and safety and that an appropriate risk assessment has been carried out.
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Leaf discs (activity sheet) 100 KB -
Leaf discs (information sheet) 2.37 MB -
Leaf discs (teachers' notes) 107 KB
Download all files as a .zip1016.41 KB
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