b. Students can measure the rate over time. Answer the lab question – What factors affect the rate of photosynthesis in plants? The 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. Lab 8: Determining the Rate of Photosynthesis in a Leaf. 3. Photosynthesis SHORT ANSWER Experiment 1: Measuring the Rate of Photosynthesis Lab Results 1. the rate of photosynthesis minus the rate of cellular respiration). Include a brief statement describing why you selected the graphing method you did. Write a detailed conclusion based on your results. 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? The FLDA actually measures the rate of photosynthetic oxygen production minus the rate of respiratory oxygen use during the same period. Photosynthesis I: An Assay Utilizing Leaf Disks. 5. A plant is shown in a beaker and test tube which bubbles to indicate the rate of photosynthesis. Background Information: Chloroplasts are located in the cells in the center of a leaf, called the mesophyll, or “middle tissue”. Experiment 3: Measuring the Rate of Photosynthesis with Floating Leaf Discs. They compare the rate of net photosynthesis in water vs. a … What was the name of the plant you used to study photosynthesis? 1985. Calculate the change in volume for each measurement time. Did the rate of photosynthesis increase or decrease due to the independent variable? In Volume For 5 Minutes Is 0.4 ML For Example, If The Volume At 5 Minutes Is 4 ML. Start studying Photosynthesis lab. Can you think of a way to how you might measure the gross rate of photosynthesis with this technique? Question: Photosynthesis SHORT ANSWER Experiment 1: Measuring The Rate Of Photosynthesis Lab Results 1. 4. 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. Calculate the change in volume by subtracting the later gas volume from the earlier gas volume. Present your results in a graph. elodea 2. The rate that the disks sink is an indirect measure of the rate of cellular respiration. Steucek, Guy L. Robert J. Hill and Class/Summer 1982. 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. Print and Web Resources: ! Fill in the table below with the results from your first experiment. 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 “The hypothesis was…” a. As photosynthesis proceeds oxygen is released into the interior of the leaf which changes the buoyancy--causing the disks to rise. Be sure to clearly indicate the x and y axes, the units used, and the graph title(s). ... Like all enzyme-driven reactions the rate of photosynthesis can be measured by either. ... What is an indirect measurement of the net rate of photosynthesis occurring in the leaf tissue? 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) El Odea Branch 2. Post-Lab Questions. Fill In The Table Below With The Results From Your First Experiment. 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