Energy Work

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Energy Work

  1. 1. By: Rebecca Stemkoski Energy & Work
  2. 2. What is Energy? <ul><li>Capacity for performing work. </li></ul>
  3. 3. What is Work? <ul><li>The transfer of energy from one physical system to another, especially the transfer of energy to a body by the application of a force that moves the body in the direction of the force. </li></ul>
  4. 4. There are Two Forms of Energy: <ul><li>Potential </li></ul><ul><li>Kinetic </li></ul>
  5. 5. What is Potential Energy? <ul><ul><li>It is something waiting to be converted into power. A raised weight, coiled spring, or charged battery has potential energy. </li></ul></ul>
  6. 6. What is Kinetic Energy? <ul><li>The energy possessed by a body because of its motion. </li></ul>
  7. 7. Where can you find Energy?
  8. 8. Some places you can find energy: <ul><li>Any electronic device that contains a charged battery. </li></ul><ul><li>Riding your bike down the road. </li></ul><ul><li>Bottle Rockets. </li></ul><ul><li>Driving a car. </li></ul><ul><li>Eating and Digesting food. </li></ul>
  9. 9. What kinds of Energy did you use today? <ul><li>-- Electricity, if you used electric lights , or a radio , or TV. </li></ul><ul><li>-- Light --that was what the electricity in the lightbulb was converted to. </li></ul><ul><li>-- Sound --that was what the electricity in the radio was converted to. </li></ul><ul><li>-- Chemical energy- -when you ate breakfast , it gave you strength. </li></ul><ul><li>-- Heat --if you cooked your food, or heated the house . </li></ul><ul><li>-- Nuclear energy- -if you enjoyed sunlight , because the Sun gets its energy by combining atomic nuclei of hydrogen to helium, deep inside it. </li></ul>
  10. 10. What kind of Energy is being transferred when using an electric fan?
  11. 11. Electric to Kinetic
  12. 12. In a car battery?
  13. 13. Chemical to Electric.
  14. 14. Can it be converted back to chemical energy?
  15. 15. Yes, when the battery is charged.
  16. 16. In a rocket nozzle?
  17. 17. Heat to Kinetic.
  18. 18. Are We Running out of Energy? <ul><li>Hydrogen fuel cells generate electricity </li></ul><ul><li>Advanced natural gas turbines </li></ul><ul><li>coal combustion </li></ul><ul><li>Wind power </li></ul><ul><li>Biomass energy </li></ul><ul><li>Alternative transportation fuels </li></ul><ul><li>Geothermal energy </li></ul><ul><li>Hot hydrothermal resources </li></ul>NO.
  19. 19. Indiana Standards <ul><li>5.1.1 Recognize and describe that results of similar scientific investigations may turn out differently because of inconsistencies in methods, materials, and observations*. </li></ul><ul><li>5.2.4 Keep a notebook to record observations and be able to distinguish inferences* from actual observations. </li></ul><ul><li>5.2.8 Recognize when and describe that comparisons might not be accurate because some of the conditions are not kept the same. </li></ul><ul><li>5.5.1 Make precise and varied measurements and specify the appropriate units. </li></ul>
  20. 20. References <ul><li>http://www-istp.gsfc.nasa.gov/stargaze/Lenergy.htm </li></ul><ul><li>www.howstuffworks.com </li></ul><ul><li>http://science.howstuffworks.com/fpte10.htm </li></ul><ul><li>http://www.indianastandardsresources.org/standardSummary.asp?Subject=sci&Grade=5# </li></ul>

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