SCI 207 Week 4 Lab A+++

SCI 207 Week 4 Lab 4 - Energy Sources and Alternative Energy

Experiment 1: The Effects of Coal Mining
Table 1: pH of Water Samples
Water Sample	Initial pH	Final pH (after 48 hours)
Pyrite		
Activated Carbon		
Water		

POST LAB QUESTIONS

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?

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 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- 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- 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.