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Investigating the Effect of Light Intensity on Oxygen Production in an Aquatic Plant.

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Introduction

BIOLOGY COURSEWORK Investigating the Effect of Light Intensity on Oxygen Production in an Aquatic Plant. Analysis. The results in the table below show the results of an experiment investigating the change of light intensity on the production of oxygen in an aquatic plant, Elodea. Distance from Lamp (cm) Number of Bubbles per Minute 100 6 60 10 40 18 30 24 20 25 On the following page is the graph I drew of the above results. ...read more.

Middle

The gradients show the rate of reaction in each section, between two distances. m = gradient m = change in y-values change in x-values A) m = 4 (number of bubbles per min) 13 (cm) m = 0.31 bubbles per min/cm B) m = 4 (number of bubbles per min) 7 (cm) m = 0.57 bubbles per min/cm C) ...read more.

Conclusion

The findings show that as the distance from the lamp was further away from the Elodea, the number of bubbles produced was less. The further the lamp was from the plant, the less it could photosynthesis and produce oxygen. So as light intensity increased the rate of photosynthesis increased, and is limiting the rate of the reaction. ...read more.

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    This means that the rate of photosynthesis was at its highest. However, when the distance of the lamp from the Elodea is 50cm, the average number of bubbles is only 13 with a light intensity of 0.0004 lux. This means that the rate of photosynthesis was at its slowest in this experiment.

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