Table of Contents Environmental Science
Lab 4
Energy Sources and Alternative Energy
Introduction
Non-renewable Sources
Concepts to ExploreConcepts to ExploreConcepts to ExploreConcepts to Explore
???? Did You Know... Did You Know... Did You Know... Did You Know...
Energy Sources and Alternative Energy
Passive Solar Energy
Active Solar Energy
Energy Sources and Alternative Energy
Photovoltaics
Energy Sources and Alternative Energy
Wind Energy
Energy Sources and Alternative Energy
Experiment 1: The Effects of Coal Mining
Procedure
Materials
Energy Sources and Alternative Energy
Hypothesis
Post-Lab Questions
Energy Sources and Alternative Energy
Experiment 2: Solar Energy
Procedure
Materials
Energy Sources and Alternative Energy
Energy Sources and Alternative Energy
Energy Sources and Alternative Energy
Hypothesis
Post-Lab Questions
Energy Sources and Alternative Energy
Lab 4 - Experiment 1: The Effects of Coal Mining
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Table 1: pH of Water Samples |
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Water Sample |
Initial pH |
Final pH |
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Pyrite |
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Activated Carbon |
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Water |
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Hypothesis:
Post-Lab Questions
1. Restate your hypothesis. Was it confirmed or denied? How do you know?
2. What, if any, change did you observe within your water samples?
3. What type of substance formed in the jars?
4. What effect do you predict coal mining has on the environment?
5. What can be done to prevent mine drainage from damaging the ecosystem?
Lab 4 - Experiment 2: Solar Energy
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Table 2: Solar Energy Experiment Results |
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Environmental Descriptor/Variable |
Observations |
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Weather of the Day |
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Light Source |
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Incandescent Bulb Wattage |
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Sunlight Angle |
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Sunlight with Reflector |
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Shaded Configuration A Description |
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Shaded Configuration B Description |
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Shaded Configuration C Description |
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Red Filter |
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Blue Filter |
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Green Filter |
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Yellow Filter |
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Hypothesis:
Post-Lab Questions
1. Restate your hypothesis. Was it confirmed or denied? How do you know?
2. How did the revolutions of the motor compare when the solar cell was held to an incandescent light source vs. the sun as a light source?
3. Does increased exposure to the sun’s light produce more current? Explain.
4. How did shading different parts of the solar panel affect the motor’s output?
5. What effect did you observe when different colored filters were placed atop the solar panel? What does this indicate about different wavelengths of light?
6. How could you increase the electricity generated by a solar cell during the day, when the sun’s angle is constantly changing?
© eScience Labs, 2012
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