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AGC/United Learning • 1560 Sherman Ave., Suite 100 • Evanston, IL 60201 • 800-323-9084

INTRODUCTION

This Teacher’s Guide accompanies Program Twenty-Two, “Efficiency of Energy Conversion,” from the Simply Sci- ence series.

Simply Science is a series of twenty-five science programs for high school students. These instructional programs use practical applications as context to the interdisciplinary con- cept development emphasizing the connections among sci- ence, technology, and society. This comprehensive Teacher’s Guide and accompanying blackline master ac- tivity sheets provide extended practice and additional learn- ing opportunities.

PROGRAM SUMMARY

“Efficiency of Energy Conversion” investigates mechani- cal and biological systems to determine the efficiency of energy use. In any conversion some energy will be con- verted to undesired forms. Efficiency is defined as the ra- tio of the useful output energy to the input energy expressed as a percent.

LINKS TO CURRICULUM STANDARDS

“Efficiency of Energy Conversion” correlates with the fol- lowing National Science Education Standards for grades 9-12: Physical Science: Chemical reactions

  • Chemical reactions may release or consume energy. Some

reactions such as burning fossil fuels release large amounts of energy by losing heat and by emitting light. Light can initiate many chemical reactions such as photosynthesis and the evolution of urban smog. Physical Science: Motion and force

  • Objects change their motion only when a net force is

applied. Laws of motion are used to calculate precisely the

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