Table of Contents Environmental Science

Lab 4

Energy Sources and Alternative Energy

Introduction

Non-renewable Sources

Concepts to ExploreConcepts to ExploreConcepts to ExploreConcepts to Explore

???? Did You Know... Did You Know... Did You Know... Did You Know...

Energy Sources and Alternative Energy

Passive Solar Energy

Active Solar Energy

Energy Sources and Alternative Energy

Photovoltaics

Energy Sources and Alternative Energy

Wind Energy

Energy Sources and Alternative Energy

Experiment 1: The Effects of Coal Mining

Procedure

Materials

Energy Sources and Alternative Energy

Hypothesis

Post-Lab Questions

Energy Sources and Alternative Energy

Experiment 2: Solar Energy

Procedure

Materials

Energy Sources and Alternative Energy

Energy Sources and Alternative Energy

Energy Sources and Alternative Energy

Hypothesis

Post-Lab Questions

Energy Sources and Alternative Energy

image1.png

Lab 4 - Experiment 1: The Effects of Coal Mining

Table 1: pH of Water Samples

Water Sample

Initial pH

Final pH

Pyrite

Activated Carbon

Water

Hypothesis:

Post-Lab Questions

1. Restate your hypothesis. Was it confirmed or denied? How do you know?

2. What, if any, change did you observe within your water samples?

3. What type of substance formed in the jars?

4. What effect do you predict coal mining has on the environment?

5. What can be done to prevent mine drainage from damaging the ecosystem?

Lab 4 - Experiment 2: Solar Energy

Table 2: Solar Energy Experiment Results

Environmental Descriptor/Variable

Observations

Weather of the Day

Light Source

Incandescent Bulb Wattage

Sunlight Angle

Sunlight with Reflector

Shaded Configuration A Description

Shaded Configuration B Description

Shaded Configuration C Description

Red Filter

Blue Filter

Green Filter

Yellow Filter

Hypothesis:

Post-Lab Questions

1. Restate your hypothesis. Was it confirmed or denied? How do you know?

2. How did the revolutions of the motor compare when the solar cell was held to an incandescent light source vs. the sun as a light source?

3. Does increased exposure to the sun’s light produce more current? Explain.

4. How did shading different parts of the solar panel affect the motor’s output?

5. What effect did you observe when different colored filters were placed atop the solar panel? What does this indicate about different wavelengths of light?

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

© eScience Labs, 2012

image1.png

Get help from top-rated tutors in any subject.

Efficiently complete your homework and academic assignments by getting help from the experts at homeworkarchive.com