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To experiment with different variables that effect photosynthesis using a computer simulation, and take measurements accordingly.

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Photosynthesis - Science Coursework: Task: To experiment with different variables that effect photosynthesis using a computer simulation, and take measurements accordingly. Prediction: I predict that firstly the increased temperature will generate more oxygen, however this will only apply to a certain degree, probably around 35?C to 40?C in my opinion, where I think the equation will be at its optimum heat capacity. And for the additional experiment, I think that an increased in Carbon dioxide levels will again produce greater amounts of Oxygen. Lastly, a higher light intensity, in my opinion will produce increased levels of Oxygen because as the formula states sunlight is essential for the reaction to take place, therefore it is likely the greater this is the more Oxygen is produced. Method: We first decided to find out how the temperature affects the rate of photosynthesis. ...read more.


Conclusion - See attached graphs, reference Gr. 1 and Gr. 2: Looking at the first experiments results and Gr. 1, I conclude that temperature effects photosynthesis, indeed my results clearly show a steady increase of Oxygen produced from 5?C to 20?C and then a steady decline to 0?C at 40?C of temperature. As aforementioned in my prediction, I guessed that temperature would reach an optimum, however I thought this would be in excess of 10?C above my final results. The concept of temperature effecting photosynthesis can be explained by the fact that Photosynthesis takes place within cells, in organelles called chloroplast that contain the chlorophylls and other chemicals, especially enzymes, necessary for the various reactions; these enzymes work quicker with increased energy which can be in heat and light form hence a higher temperature gives these enzymes more energy to speed up the chemical reactions. ...read more.


The energized electrons are passed along an electron transport chain to photosystem I, and energy-rich adenosine triphosphate, or ATP, is generated in the process. Light energy absorbed by photosystem I is then passed to its reaction centre, and energized electrons are boosted to its electron acceptor. They are passed by means of another transport chain to energize the coenzyme nicotinamide adenine dinucleotide phosphate, or NADP, resulting in its reduction to NADPH2. The electrons lost by photosystem I are replaced by those passed along the electron transport chain from photosystem II. The light reaction ends with the energy yield stored in the ATP and NADPH2. There was one anomaly in this experiment evident by the graph this was almost certainly due to a miss-recording and we did not have time to redo the experiment, however I predict that the oxygen given off would total approximately 55 mm. John C. Kirkpatrick Tuesday, 01 May 2007 ...read more.

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