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