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Energy Conversions and Efficiency

Explore energy conversions from one form to another, such as potential to kinetic, light to chemical, and more. Learn about machines transferring energy and the importance of energy efficiency. Discover how various devices convert energy like hair dryers, alarm clocks, and light bulbs.

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Energy Conversions and Efficiency

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  1. Sci. 5 – 2 Energy Conversions Pages 124- 130

  2. A. Energy Conversions- a change from one form of energy to another

  3. Any form of energy can be converted into any other form of energy.

  4. C. Often Potential energy and kinetic energy convert back and forth like in a trampoline or a pendulum’s swing.

  5. D. Light energy from the sun is used in photosynthesis to make sugar and oxygen in plants and food.

  6. E. During photosynthesis plants convert light energy into chemical energy.

  7. F. Electrical energy is easily converted into other forms of energy.

  8. 1) Hair dryer- sound, thermal, and kinetic

  9. 2) Alarm clock- light and sound

  10. 3) Light bulb- light and thermal

  11. G. Machines can transfer energy and convert energy into a more useful form.

  12. H. In a battery, chemical energy is converted into electrical energy.

  13. Energy Efficiency- a comparison of the amount of energy before a conversion with the amount of USEFUL energy after a conversion. • J. Energy input is ALWAYS greater than energy output.

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