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Elodia Experiment.

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Elodia Experiment Scientific Introduction Photosynthesis, which means putting together with light, is the process by which green plants transform light energy along with other aspects into food (glucose), which gives the plant energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide and minerals into oxygen and energy rich organic compounds. The equation used for photosynthesis is: 6CO2 + 6H2O light energy & chlorophyll C6H12O6 + 6O2 There are four things needed for photosynthesis to happen, these are light, chlorophyll, carbon dioxide and water, without these photosynthesis cannot take place. The factors affecting the rate of photosynthesis are: * Light: The chlorophyll uses light energy to perform photosynthesis, the chlorophyll is required to power several reactions in order for this to happen. If there is an increase in light these reactions will take place faster and will produce more glucose and oxygen. This will only happen for a certain amount of time and then will go at a constant rate, where photosynthesis will be performed at the same speed. ...read more.


Results Distance No. of bubbles in 5 minutes Average no. of bubbles in 5 minutes Difference in no. of bubbles Average increase in no. of bubbles 800mm 32 34 33 4.67 700mm 36 36 36 3 600mm 41 40 40.5 4.5 500mm 44 47 45.5 5 400mm 52 51 51.5 6 300mm 56 56 56 4.5 200mm 62 60 61 5 100mm 84 86 85 24 23.75 0mm 108 109 108.5 23.5 The increase in the rate of photosynthesis (bubbles) is measured at 4.67 to 23.75 at 200mm. This factor can be expressed in the following sequence: 23.75/4.67= 5.09 The results show that my prediction is right and that the closer the lamp the more bubbles are produced. The results show that light is a factor that affects the rate of photosynthesis, as the results showed that as the plant received more light the more bubbles came from the plant. I can come up with a valid conclusion showing that the increase in light will increase the rate of photosynthesis, this conclusion supports my prediction but the experiment cannot show me how long it would take for the rate of photosynthesis to drop. ...read more.


The experiment had a beaker full of the solution Sodium Bilarbonate which supplies carbon dioxide to the plant, from looking at the experiment we cannot tell if it is supplying enough CO2 or if it is supplying too much CO2. Seeing as carbon dioxide is a factor that affects the rate of photosynthesis this can make the results less reliable. The bubbles may not come just from the stem, which will make the results unreliable; bubbles could have come from different parts of the plant. This could be resolved by cutting the plant once it is in the solution. The glass sheet used to stop the heat may have let in heat which made the chlorophyll react faster which made the last two results higher than the others. It would be better if the experiment was repeated again to get more accurate results, another experiment should be carried out to show how long the plant can take the light. So in conclusion the experiment cannot prove anything for me as it had many flaws and anomalies. Helalur Rahman Khan 3894 ...read more.

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