CONCEPT: Energy may be obtained from various sources.
CONTENT OBJECTIVE: 6C7.00 To understand alternative energy forms
INSTRUCTIONAL OBJECTIVE: The learner will:
7.01 determine the advantages and disadvantages of using alternate forms of energy to meet the demands of a situation.
OUTLINE OF CONTENT:
I. Advantages of alternate energy source
II. Disadvantages of alternate energy source
TN COMPONENT OF SCIENCE: Unifying Concepts of Science
TN GOAL:
To enable students to acquire scientific knowledge by applying concepts, theories, principles and laws from life/environmental, physical, and earth/space science.
TN THEME:
2.2 FORM AND FUNCTION - Form may determine the function of a material or a system, and function may alter form.
TN STANDARD(S): The learner will understand that:
2.2a How an object functions is related to its form.
BENCHMARK: There are different forms of energy such as heat, mechanical, chemical, electrical, nuclear, and light.
2.2b Form tends to dictate function, thus an alteration of form may lead to a change in function.
BENCHMARK: The survival of individual organisms and entire species is dependent upon environmental conditions.
CLASSROOM CONNECTOR
TIME REQUIRED:
45 minutes
MATERIALS:
Newspaper and magazine articles, encyclopedias, utility (power company) prepared materials
SET:
In the last lesson, we learned how the standard of living affects the energy consumption. Name one thing you could do to use less electrical energy. Today we will discuss the advantages and disadvantages of using alternate energy sources.
INSTRUCTION:
Advantages of alternative energy sources (Solar, wind, nuclear, hydrogen) are that they are free or low in cost, they are replenishable, some are abundant in supply, they have a low operating cost, they are environmentally safe, they can be located where needed, they can conserve land, and they can generate electricity. Disadvantages of alternative energy sources are that they have a high development or installation cost, they are intermittent and variable in availability, the technology is not compatible to fossil fuels, they may pollute air and water, some are geographically restricted, some create waste disposal problems and they have a high initial plant or production cost.
ACTIVE PARTICIPATION:
(The following activities are suggested:
1. Have a debate on the advantages and disadvantages of using alternative sources instead of conventional sources of energy. Have students choose sides for the debate.
2. Have the students prepare a "commercial" advocating an alternative source of energy.)
3. Have students brain storm how individuals could be harmed by alternative energy saver.
CLOSURE:
Today we have learned about alternate energy sources. Tell your neighbor what an alternate energy source is and then name one. (pause, then summarize)
How could these alternative energy sources affect environmental conditions so that an entire species could be affected?
ENRICHMENT:
(The following activities are suggested:
1. Have the students graph the cost of a kilowatt hour of electricity as produced by gas, oil, coal, nuclear, and hydrogen.
2. Make a natural energy resources chart showing the advantage and disadvantage of solar, wind, tide, biomass, geothermal, and fusion. Have the students locate the needed information to complete the chart.)
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time this file has been accessed since 02/25/98.
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