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Practical skills practice questions

Practise mixed syllabus-aligned questions for Practical skills. Aligned to OCR Gcse Combined Science A Gateway.

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A student conducted an experiment to investigate the effect of temperature on the rate of photosynthesis. They used pondweed and recorded the volume of oxygen produced in 5 minutes at different temperatures. Their results are shown in the table below: | Temperature (°C) | Volume of oxygen produced in 5 minutes (cm³) | |------------------|-----------------------------------------------| | 10 | 1.2 | | 20 | 2.5 | | 30 | 3.8 | | 40 | 3.0 | | 50 | 0.5 | Explain how temperature acts as a limiting factor in photosynthesis based on these results. Calculate the percentage change in the volume of oxygen produced when the temperature increased from 20°C to 30°C. [4 marks]

Practical skills questions | OCR GCSE Combined Science A Gateway | ExamCompanion