They compare the rate of net photosynthesis in water vs. a … 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? Materials: Sodium bicarbonate (Baking soda) Answer the lab question – What factors affect the rate of photosynthesis in plants? Experiment 3: Measuring the Rate of Photosynthesis with Floating Leaf Discs. b. Calculate the change in volume by subtracting the later gas volume from the earlier gas volume. 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. 5. In Volume For 5 Minutes Is 0.4 ML For Example, If The Volume At 5 Minutes Is 4 ML. “The data show …” a. Lab 8: Determining the Rate of Photosynthesis in a Leaf. Present your results in a graph. 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. Steucek, Guy L. Robert J. Hill and Class/Summer 1982. 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 FLDA actually measures the rate of photosynthetic oxygen production minus the rate of respiratory oxygen use during the same period. Post-Lab Questions. 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. 1985. What was the name of the plant you used to study photosynthesis? The 4. elodea 2. A plant is shown in a beaker and test tube which bubbles to indicate the rate of photosynthesis. Start studying Photosynthesis lab. 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. El Odea Branch 2. The rate that the disks sink is an indirect measure of the rate of cellular respiration. the rate of photosynthesis minus the rate of cellular respiration). ... What is an indirect measurement of the net rate of photosynthesis occurring in the leaf tissue? Print and Web Resources: ! Compare experimental results to control groups! Learn vocabulary, terms, and more with flashcards, games, and other study tools. ... Like all enzyme-driven reactions the rate of photosynthesis can be measured by either. 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 In this virtual photosynthesis lab, students can manipulate the light intensity, light color, and distance from the light source. Fill in the table below with the results from your first experiment. Background Information: Chloroplasts are located in the cells in the center of a leaf, called the mesophyll, or “middle tissue”. Students can measure the rate over time. Be sure to clearly indicate the x and y axes, the units used, and the graph title(s). Did the rate of photosynthesis increase or decrease due to the independent variable? Calculate the change in volume for each measurement time. What Was The Name Of The Plant You Used To Study Photosynthesis? 3. 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