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These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.

The response of leaf discs to green light

Produced by Science & Plants for Schools (SAPS), this investigation enables students to investigate the response of leaf discs from sun and shade plants to green light

Leaf discs from a sun plant and a shade plant are put in a sodium hydrogen carbonate solution. The rate of photosynthesis is seen by how long it takes the leaf discs to re-float, due to oxygen production, when they are illuminated with light of different colours.

The investigation is designed for students following a Scottish Highers course but it is equally useful for other post-16 courses in biology. It could also be adapted for younger secondary school students.

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