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For 9th grade Physics, chapter 6 "Energy transformations and energy transfers"
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For 9th grade Physics, chapter 6 "Energy transformations and energy transfers"

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Transcript

  • 1. What is Energy? What are the different forms of Energy?
  • 2. What is Energy? • The ability to do work
  • 3. Can you make things move? • Then you have energy… • …but there are seven different kinds of energy…
  • 4. Chemical Energy • What holds atoms in molecules together • Can be released by chemical reactions like burning wood
  • 5. Electrical Energy • The movement of electrons through matter • Electricity is a form of electrical energy
  • 6. Heat Energy • The random motion, or vibration, of atoms in matter • The faster the atoms vibrate the more heat energy they have
  • 7. Light Energy • The energy carried by light • Yes, whenever you are looking at light, you are looking at energy
  • 8. Mechanical Energy • The energy of moving things • When you ride a bike you use mechanical energy
  • 9. Nuclear Energy • Holds protons and neutrons together in an atom’s nucleus • Powers the sun and nuclear power plants (reactors)
  • 10. Nuclear energy to thermal energy
  • 11. Sound Energy • Vibrates air molecules • The air molecules move tiny bones in your ear • The message of sound then moves to your brain • Can also vibrate objects
  • 12. Mechanical energy to sound energy and some lost thermal energy
  • 13. Electrical energy to sound energy and some lost thermal energy
  • 14. Energy can be changed from one form to another • Chemical energy in gasoline is changed to heat energy and then to mechanical energy in a car.
  • 15. Kinetic energy to electrical energy
  • 16. Chemical energy to potential energy and kinetic energy