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Photosynthesis GIZMO worksheet 2020-2021 my work

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Name: sarah post Date: 4/15/21 Student Exploration: Photosynthesis Lab Vocabulary: carbon dioxide, chlorophyll, glucose, limiting factor, nanometer, photosynthesis, wavelength Prior Knowledge Questions (Do these BEFORE using the Gizmo.) • To survive, what gas do we need to breathe in? • Where is this gas produced? Gizmo Warm-up During photosynthesis, plants use the energy of light to produce glucose (C6H12O6) from carbon dioxide (CO2), and water (H2O). Glucose is a simple sugar that plants use for energy and as a building block for larger molecules. A by-product of photosynthesis is oxygen. Plants use some of the oxygen they produce, but most of it is released. In the Photosynthesis Lab Gizmo, you can monitor the rate of photosynthesis by measuring oxygen production. 1. Observe the left pane closely. What do you think the bubbles are? 2. Select the BAR CHART tab. On the graph, notice the Oxygen production bar. Move the Light intensity slider back and forth. How does light intensity affect oxygen production? The lower the light intensity, the slower the oxygen production, but the oxygen bar stops going at 31.3 mL/h. 3. Experiment with the vertical Temperature slider (upper left) and the CO2 level slider. A. How does temperature affect oxygen production? _ when the temperature is in between 0℃ - 50℃ there is oxygen production. B. How does CO2 level affect oxygen production? When the CO2 levels are low there is little to no oxygen production, when the CO2 levels are higher there is lots of oxygen production. C. How does oxygen production relate to the rate of photosynthesis? When there is a high oxygen production there is a high rate of photosynthesis. Activity A: Ideal conditions Get the Gizmo ready: • Be sure that the BAR CHART tab is selected. • Turn on Show numerical values. Question: In the Gizmo, what are the ideal conditions for photosynthesis? 1. Form hypothesis: During photosynthesis, light energy is used to synthesize carbon dioxide (CO2) and water (H2O) into glucose (C6H12O6) and oxygen (O2). The complex series of chemical reactions is summarized by the following formula: 6CO2 + 6H2O + light energy  C6H12O6 + 6O2 In the Gizmo, what light intensity and CO2 level do you think will maximize the rate of photosynthesis? I think the highest light intensity and CO2 levels will maximize the rate of photosynthesis because that would cause the greatest amount of oxygen production. 2. Experiment: Use the Gizmo to find the ideal conditions for photosynthesis. Use any method you like. When you think you have the answer, list the conditions below. ....................................................................................continued......................................................................................

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