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Conservation of Energy Energy Released Based on Exposure to Different Colors of Light
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Research Question and Hypothesis How does being exposed to different colors of light change the rate of conservation of energy of a rose? The roses exposed to violet light will conserve energy the fastest, and the roses exposed to red light will conserve energy the slowest.
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Distribution of Work ●Biology students research and organize important information about the rose and its interaction with the environment. ●Chemistry students assist in calculating and organizing data. ●Physics students assist in calculating and organizing data, as well as putting it on the powerpoint. ●All students assemble and carry out the experiment.
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Contribution of Each Discipline ●Facts about the rose and their biological tendencies are contributed by the biology discipline. ●The chemical reaction of the roses burning and the energy given off by the reaction was the contribution of the chemistry discipline. ●The roses’ absorption of the energy of different colored lights and the calculations to find this energy is the contribution from the physics discipline.
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Photo Setup
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Experiment in Action ControlsExposed to Red Exposed to Green Exposed to Violet Controls Exposed to Red Exposed to Green Exposed to Violet
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Raw Data - Biological Facts About Roses ●Roses need an inch of water a week. ●Roses need about 6 hours of sunlight a day. ●Most plants, including roses, absorb red light the best because their leaves are green.
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Raw Data - Given Wavelengths of Light ●λ of visible light = 400-700 nm ●λ of red light = 620-750 nm ●λ of green light = 495-570 nm ●λ of violet light = 380-450 nm
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Calculated Data - Energy of Hues of Light ●Energy of visible light: 3.518e-19 Joules per photon ●Energy of red light: 2.902e-19 Joules per photon ●Energy of green light: 3.733e-19 Joules per photon ●Energy of violet light: 4.789e-19 Joules per photon.
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Calculated Data - Final Mass of Roses RoseMass (g) Control #113.9 Control #212.4 Red #118.3 Red #213.5 Green #117.5 Green #218.3 Violet #115.8 Violet #212.7
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Graphs
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Expected Outcomes ●The roses exposed to the light with the highest energy, violet light would burn the most and give off the most energy. ●The roses exposed to the light with the lowest energy, red light, would burn the least. ●Energy throughout this process would be conserved. ●We would be able to calculate the speed of burning, along with the speed of conservation of energy.
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Unexpected Outcomes ●We didn’t expect the roses exposed to red light to release more energy than the roses exposed to ordinary, visible light. ●We didn’t expect green light to hardly have an effect when drying out the roses. ●The results of the experiment would all look the same, and each rose would burn at an extremely similar rate.
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How the Results Support Hypothesis ●The roses exposed to red light gave off the least amount of energy, and the roses exposed to the violet light gave off the most energy. ●The roses exposed to violet light dried out the most. ●Throughout the experiment, energy was conserved.
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How the Results Contradict Hypothesis ●The rate of conservation of energy could not be measured because the rate energy is being converted cannot be determined, it is not constant. ●The results didn’t vary to the degree we expected when we wrote our hypothesis.
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Sources Chandler, Bill. "Frequently Asked Questions about Roses." Union University, n.d. Web. 26 May 2015..http://www.uu.edu/personal/bnettles/rofaq/rofaq- faq.html#FAQ_qa_sun "How Do Different Color Filters Affect Plant Growth?" UCSB Science Line. N.p., n.d. Web. 26 May 2015..http://scienceline.ucsb.edu/getkey.php?key=3155 "What Wavelength Goes With a Color?" NASA, n.d. Web. 26 May 2015..http://science-edu.larc.nasa.gov/EDDOCS/Wavelengths_for_Colors.html
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