Copy of Photosynthesis Lab Report.docx - Photosynthesis Lab AP Biology 8th hour 28 October 2016 Abstract It was expected with a greater concentration of

Copy of Photosynthesis Lab Report.docx - Photosynthesis Lab...

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Photosynthesis Lab AP Biology 8th hour 28 October 2016 Abstract:
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It was expected with a greater concentration of carbon dioxide in a cup of water, the faster photosynthesis will occur in a leaf chad, but at a certain point, the rate will level off. This experiment included expelling oxygen from the chads, adding them to cups with different concentrations of carbon dioxide, placing a light source over the cups, and recording the time it took for the chads to float. The hypothesis was somewhat supported by the data. The results of the experiment make sense because carbon dioxide is needed for photosynthesis, however, there are other limiting factors involved. Introduction:
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Even though photosynthesis seems like a pretty straight forward occurrence in plants, there are many different factors that can affect the rate of photosynthesis. In the experiment conducted, the concentration of carbon dioxide was tested to see how it correlated with the rate in which photosynthesis occurs. The hypothesis for this particular experiment was that the more carbon dioxide that was exposed to the plant the faster photosynthesis would occur, until increasing the amount of carbon dioxide will no longer affect the rate of photosynthesis. In order to test this, spinach leaves were acquired and ten chads were punched out of them. To get different concentrations of carbon dioxide, different amounts of sodium bicarbonate were added to 300mL of distilled water. Next, the spinach leaf chads were put inside a syringe and water was added. Expelling any air bubbles from the syringe, a finger was placed over the top of it and the plunger was pulled down in order to create a vacuum, which in turn, would allow the chads to sink. Then the chads were placed into different concentrations of carbon dioxide. A light source was placed over the chads in different concentrations and a timer was started. When a chad would rise and hit the surface, the time would be recorded. The results of the lab showed that, for the most part, the higher the concentration of carbon dioxide, the faster photosynthesis occurred. The only concentration that did not follow this pattern was at a concentration of .8M carbon dioxide. This type of data could be used for many real world instances. For example, this information could be utilized by greenhouse owners; by increasing the amount of carbon dioxide in the greenhouses, rate of photosynthesis would also increase, which would give the plants more energy to grow.
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