The Effects of Coal Mining

1.    Develop hypotheses predicting the effect of pyrite and coal (activated carbon) on the acidity of water?

a.    Pyrite hypothesis =

b.    Coal (activated carbon) hypothesis =

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 =

b.    Coal (activated carbon) hypothesis accept/reject =

3.    Based on your data, what effect do you predict coal mining has on the environment?

4.    What can be done to prevent mine drainage from damaging the ecosystem?  Utilize at least one scholarly resource to support your suggestions.

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 four variables tested?

Direct vs indirect hypothesis =

Direct vs reflected hypothesis =

Direct vs shaded hypothesis =

Direct vs filtered hypothesis =

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.

4.    How could you increase the electricity generated by a solar cell during the day, when the sun’s angle is constantly changing?

5.    Based on your data, could adding filters to solar panels increase the solar energy produced?  Explain how you know this.