Pyrite hypothesis = If pyrite is added to a beaker with 100mL of water, then it will reduce the pH over 48 hours. b. Coal hypothesis = It activated carbon is added to a beaker with 100mL of water, then it will increase the pH over 48 hours. 2. Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how you determined this. a. Pyrite hypothesis accept/reject = I would accept the hypothesis, seeing as how the pH did in face lower from 6 to 2.
b. Coal hypothesis accept/reject = I would consider this hypothesis to be correct as the pH increased from 6 to 10.
3. Based on your data, what effect do you predict coal mining has on the environment? Answer = Coal mining basically removes the coal from the ground which would hinder the Earth’s ability to reduce its acidity as the charcoal helps raise and ultimately balance the planet’s pH. The soil’s pH greatly affects the way planet life ingests nutrients and flourishes, which allows humans to harness essential components from nature.
4. What can be done to prevent mine drainage from damaging the ecosystem? Utilize at least one scholarly resource to support your suggestions.
Answer = According to World Coal, there are mining operations underway to help refresh damaged land. This is done by shaping the previously mined soil, then packing it and laying it back down in such a way to vegetate healthily again (Coal Mining ; the Environment, n. d. ). Experiment 2: Solar Energy Table 2: Solar Energy Experiment Results Environmental Descriptor/Variable Observations (Each should be compared against direct sunlight) Weather of the Day Motor speed in direct sunlight Motor speed at 45 degree angle Motor speed under reflectors Motor speed with 25% shaded Motor speed with 50% shaded Motor speed with 75% shaded
Motor speed under red filtration Motor speed under blue filtration Motor speed under green filtration Motor speed under yellow filtration Post-Lab Questions 1.
Develop hypotheses predicting the efficiency of solar energy from direct sunlight against the 4 variables tested? Direct vs indirect hypothesis = If the solar panel is faced towards direct sunlight, then the motor will move faster. Direct vs reflected hypothesis = If the solar panel is faced towards a reflected sunlight, then the motor will move slower. Direct vs shaded hypothesis = If the solar panel is placed in a shaded location, then the motor will not move at all.
Direct vs filtered hypothesis = If solar panel is covered with a colored filter, then the motor will either move the same or slower depending on the color. 2. Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how you determined this. Direct vs indirect accept/reject = Direct vs reflected accept/reject = Direct vs shaded accept/reject = Direct vs filtered accept/reject = 3. Does increased exposure to the sun’s light produce more current? Explain how you know this based on your data? Answer = 4.
How could you increase the electricity generated by a solar cell during the day, when the sun’s angle is constantly changing? Answer = You could attach the solar panel to a device that move in correlation with the sun’s movement throughout the day, maximizing the efficiency of the solar panel all day. 5. Based on your data, could adding filters to solar panels increase the solar energy produced? Explain how you know this. Answer = References Coal Mining & the Environment. (n. d. ). mine rehabilitation, mine reclamation. Retrieved March 19, 2014, from http://www. worldcoal. org/coal-the-environment/coal-mining-the-environment/