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The Hypothesis

This Cape Farewell video clip explains that phytoplankton absorb carbon dioxide and can act as indicators of global warming. The video clip includes a discussion about a hypothesis that increasing phytoplankton could balance the effects of global warming.

Activity C - Making and testing hypotheses follows up the video with some questions about what constitutes a hypothesis. Activity D - Photosynthesis involves practical work to measure the rate of photosynthesis. Students can try varying the amount of dissolved carbon dioxide to find out the effect and relate the activity to the video clip.

Notes on the activities and their use, with the video clip in lessons, are given in the Teachers’ Guidance.



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