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Electrical Energy

Electrical Energy. A shocking subject!. Created by Cindy Barnes. What is Electrical Energy?. Wait… What ’ s energy?. What is energy?. Energy is the ability to do work. Energy is a constant part of our lives. Energy comes in many forms. Energy cannot be destroyed.

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Electrical Energy

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  1. Electrical Energy A shocking subject! Created by Cindy Barnes

  2. What is Electrical Energy? Wait… What’s energy?

  3. What is energy? • Energy is the ability to do work. • Energy is a constant part of our lives. • Energy comes in many forms. • Energy cannot be destroyed.

  4. What is Electrical Energy? Wait… we’re still not there yet!

  5. What is an Atom? • The basic unit of matter. • Made of neutrons, protons, and electrons. • Each particle carries a specific charge.

  6. So… What is Electrical Energy? We’re finally ready! 

  7. Electrical Energy:The Energy of Moving Electrons www.mrcheapstuff.com/images/static_hair.jpg

  8. How Does That Work? • Insulators versus Conductors • Some atoms are stable, others aren’t • Unstable atoms like to share their electrons • With enough conductor atoms together, you can move electrons over a long distance • Electrical energy is the movement of these electrons from one atom to another.

  9. Measuring Electrical Energy

  10. What’s a Watt? • Watts • Measure the amount of energy actually being used or converted by the circuit (measurement of power) • Can also be described in kilowatts (1 kilowatt=1000 watts) • Measuring energy in our homes • Kilowatt-hours (kWh) • Example: A heater may be rated to use 1000 watts, or 1 kilowatt. It will use 1 kilowatt-hour if used for an hour.

  11. How Do We Create Electrical Energy? Generating a Flow of Electrons

  12. Electrical Generators • Magnets and electrical energy are linked because magnets move electrons • Faraday’s discovery – conductor + magnet = moving electrons! • We use a turbine to spin a conducting wire inside very large magnets to produce electricity! Portrait of physicist Michael Faraday by Thomas Phillips, 1842; commons.wikimedia.org

  13. How to Turn a Turbine? • Create steam • Burning fossil fuels • Nuclear power • Natural steam vents in the Earth • Flowing water • Wind HowStuffWorks.com

  14. Review • What is energy? • What is electrical energy? • What is a conductor versus an insulator? • What is a watt? What is kilowatt-hours? • How do we create electrical energy?

  15. References • Brain, Marshall, and Robert Lamb. "How Electricity Works" HowStuffWorks. HowStuffWorks, Inc., 28 May 2004. Web. 11 June 2010. <http:/science.howstuffworks.com/electricity.htm>. • Brain, Marshall, and Robert Lamb.  "How Nuclear Power Works."  09 October 2000.  HowStuffWorks.com. <http://science.howstuffworks.com/nuclear-power.htm>  28 July 2010. • "The Energy Story." Energy Quest. Ed. Suzanne Garfield. California Energy Commission, 22 Apr. 2002. Web. 11 June 2010. <http://energyquest.ca.gov/story/index.html>. • All images not otherwise cited are Microsoft Clip Art images.

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