Photosynthesis SHORT ANSWER Experiment 1: Measuring the Rate of Photosynthesis Lab Results 1. El Odea Branch 2. the rate of photosynthesis minus the rate of cellular respiration). Answer the lab question – What factors affect the rate of photosynthesis in plants? ... What is an indirect measurement of the net rate of photosynthesis occurring in the leaf tissue? elodea 2. Students can measure the rate over time. Print and Web Resources: ! Fill in the table below with the results from your first experiment. One problem in measuring a rate of photosynthesis is that there is a competing process occurring at the same time, cellular respiration, a process that uses oxygen. They compare the rate of net photosynthesis in water vs. a … Compare experimental results to control groups! Since cellular respiration is taking place at the same time, consuming oxygen, the rate that the disks rise is an indirect measurement of the net rate of photosynthesis. The rate that the disks sink is an indirect measure of the rate of cellular respiration. 4. In this virtual photosynthesis lab, students can manipulate the light intensity, light color, and distance from the light source. What Was The Name Of The Plant You Used To Study Photosynthesis? b. Purpose: The purpose of this investigation is to measure the rate of photosynthesis in spinach leaves by measuring the length of time it takes for leaf discs to generate enough oxygen to float. Did the rate of photosynthesis increase or decrease due to the independent variable? ... Like all enzyme-driven reactions the rate of photosynthesis can be measured by either. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Experiment 3: Measuring the Rate of Photosynthesis with Floating Leaf Discs. Measuring the Rate of Photosynthesis; In this section, students learn how to use the floating leaf disk method to measure the rate of net photosynthesis (i.e. Experiment 1: Measuring the Rate of Photosynthesis For the first experiment, what was the change in volume from 00:01:30 to 00:02:00? Post-Lab Questions. 1985. Can you think of a way to how you might measure the gross rate of photosynthesis with this technique? 3. Lab 8: Determining the Rate of Photosynthesis in a Leaf. Floating C3 Spinach Discs Lab Concerning Photosynthesis that Determined how Light Intensity Affects the Net Rate of Photosynthesis By Senegar & Mitchell and written by Sandra Monreal Abstract Researchers realize that spinach discs float normally so when infiltrating these discs Background Information: Chloroplasts are located in the cells in the center of a leaf, called the mesophyll, or “middle tissue”. What was the name of the plant you used to study photosynthesis? Start studying Photosynthesis lab. Calculate the change in volume for each measurement time. As photosynthesis proceeds oxygen is released into the interior of the leaf which changes the buoyancy--causing the disks to rise. The Be sure to clearly indicate the x and y axes, the units used, and the graph title(s). Photosynthesis I: An Assay Utilizing Leaf Disks. 5. Question: Photosynthesis SHORT ANSWER Experiment 1: Measuring The Rate Of Photosynthesis Lab Results 1. A plant is shown in a beaker and test tube which bubbles to indicate the rate of photosynthesis. Calculate the change in volume by subtracting the later gas volume from the earlier gas volume. Steucek, Guy L. Robert J. Hill and Class/Summer 1982. Present your results in a graph. Include a brief statement describing why you selected the graphing method you did. Fill In The Table Below With The Results From Your First Experiment. “The data show …” a. Materials: Sodium bicarbonate (Baking soda) “The hypothesis was…” a. 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