Photosynthesis Lab

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Gurgenian 1 Kevork Gurgenian Mrs. Lee Biology 9A 17 November 2015 Photosynthesis Introduction: Photosynthesis is a process used by plants and other organisms to convert light energy, normally from the sun, chemical energy that can be later released to fuel the organisms’ activities. Photosynthesis is arguably the most important biological process on earth. By liberating oxygen and consuming carbon dioxide, it has transformed the world into the hospitable environment we know today. Directly or indirectly, photosynthesis fills all of our food requirements and many of our needs for fiber and building materials. This experiment is important because it is an example of the important process of photosynthesis. This experiment investigates the effect…show more content…
It will also force O2 out of the air spaces in the leaf disks. Once the NaHCO3 has entered the leaf disks, the disks will sink to the bottom of the barrel. You may have to create the vacuum several times before all the leaf disks sink. Shake the syringe if the leaf disks stick to the barrel or each other. After, pour the contents of the barrel into one of the plastic cups covered with a light filter. Add 150 mL of NaHCO3 solution. All of the leaf disks should settle at the bottom of the cup. Next, place the cup under a lamp with a 150-watt bulb. Adjust the lamp so that the bulb is 10 cm away from the bottom of the cup. Then, add 150 mL of tap water to each of the clear plastic cups labeled “heat absorber.” Surround the cup containing the leaf disks with the heat absorbers. After, turn on the lamp, start the timer, and record the number of disks that are floating at minute 0 (the beginning of data collection.) Next, when 1 minute has elapsed, record the number of disks that are floating and then swirl the cup to dislodge any disks that are stuck to the side of the cup or each other. Use a clean pipet to dislodge the disks if necessary. Repeat this step until all of the disks are…show more content…
Farthest to the left it shows the number of disks that had risen. And in the center and on the right side it shows how many seconds it took the number of disks to rise in their respected color. The goal of this experiment had been reached prior to the experiment. The data was collected the correct way and you are able to see the effect of wavelength of light on the rate of photosynthesis. This experiment answered the research question. Also the hypothesis stated was also correct. Some things to improve this experiment are to add more cups to do more experiments, to add more different colored cellophane, and also to use different types of plants or leaves, such as

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