Contents
Part 1 of 3
Measuring the rate of photosynthesis
identify
Try it yourself
Pondweed in bright light gives off bubbles of gas. Which statement names the gas that makes up most of the bubbles, and the test that shows it?
identify: name or select.
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Scope and sources
Cambridge IGCSE Biology 0610 · 2026–2028 v3 · Original learning materials.
The effects of light intensity, carbon dioxide concentration and temperature on the rate of photosynthesis, investigated with pondweed (6.1.8); gas exchange of an aquatic plant in light and dark with hydrogencarbonate indicator (6.1.9); limiting factors in different conditions (Supplement 6.1.11); the large, thin leaf (6.2.1); the structures of a dicotyledonous leaf in diagrams and images (6.2.2) and how they adapt it for photosynthesis (6.2.3). Bubble counts and indicator colours in the experiment come from a teaching model.
Apparatus, amounts and times in the experiment are illustrative. Real practical work follows a teacher-approved safety method.
Official Cambridge syllabus