AQA RP6: Photosynthesis
Abstract:
Investigate the effect of light intensity on the rate of photosynthesis using an aquatic organism such as pondweed.
Alternative 1: Investigating the effect of light wavelength on photosynthesis in pondweed.
Alternative 2: Investigating the effect of carbon dioxide concentration on photosynthesis in pondweed
Hints & Tips:
- Cabomba caroliniana was recommended as a species for this experiment but this is no longer available in the UK, due to the invasive plant directive. Other alternatives are Elodea/ Egeria Densa, Egeria Nagas, or Cabomba Aquatica (Yellow Cabomba).
- Cut the stem under the level of the liquid at an angle, this is important as it stops airlock from forming.
- Use a lamp with at least 1000 lumens. LED lamps are best as they do not produce heat and therefore do not require a heat shield.
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RP6 - Photosynthesis (2)
RP6 - Photosynthesis (2)