Biliousness ethics

Topics: Sun, Scientific method, Photovoltaics Pages: 5 (381 words) Published: November 3, 2014
Experiment 1: The Effects of Coal Mining

Table 1: pH of Water Samples

Water Sample

Initial pH

Final pH (24-48 hours)

Pyrite

6

6

Activated Carbon

6

7

Water

6

6

POST LAB QUESTIONS

1. Develop hypotheses predicting the effect of pyrite and coal on the acidity of water?

a. Pyrite hypothesis =

b. Coal 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 hypothesis accept/reject =

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

Answer =

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

Answer =

Experiment 2: Solar Energy

Table 2: Solar Energy Experiment Results

Environmental Descriptor/Variable

Observations

(Each should be compared against direct subnlight)

Weather of the Day

Sunny, 70 degrees, winds NW@ 6 mph

Motor speed in direct sunlight

Medium

Motor speed at 45 degree angle

Medium

Motor speed under reflectors

Medium

Motor speed with 25% shaded

Medium

Motor speed with 50% shaded

Medium

Motor speed with 75% shaded

Medium

Motor speed under red filtration

Medium

Motor speed under blue filtration

Medium

Motor speed under green filtration

Medium

Motor speed under yellow filtration

Medium

Post-Lab Questions

1. Develop hypotheses predicting the efficiency of solar energy from direct sunlight against the 4 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?

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 =

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

Answer =

References

Any sources utilized should be listed here.

References: Any sources utilized should be listed here.
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