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?

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 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

Medium

Medium

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 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 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.

References

Any sources utilized should be listed here.

References: Any sources utilized should be listed here.