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Forms of Energy - PowerPoint PPT Presentation

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Forms of Energy
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  1. Forms of Energy Add these notes to your graphic organizer. Refer to textbook chapter 9, section 1 for additional information

  2. What do we need to know? S8P2. Students will be familiar with the forms and transformations of energy. a. Explain energy transformation in terms of the Law of Conservation of Energy.

  3. The law of conservation of energy states that: • Energy is neverdestroyed • Energy is nevercreated • Energy may be transformed or converted from one form to another • Energy is constantly changing forms

  4. b. Explain the relationship between potential and kinetic energy. What ELSE do we need to know? How about a little music?

  5. kinetic energy potential energy

  6. potential energy kinetic energy

  7. kinetic energy potential energy

  8. Kinetic energy Potential energy

  9. Kinetic Energy • Energy of motion • Depends on • speed • mass • More speed = more KE • More mass = more KE

  10. Potential Energy—Stored energy • Energy of position, shape, or condition • More weight = more PE • More height = more PE girl on a swing pendulum

  11. Potential energy is found in objects that want to bounce back into their natural shape when they are stretched, squished, or turned. sling shot

  12. c. Compare and contrast the different forms of energy (heat, light, electricity, mechanical motion, sound) and their characteristics. Forms of Energy include:

  13. Mechanical (Motion) Energy—total of potential and kinetic energy energy caused by objects that are moving

  14. Greatest potential energy at top (slowest/stopped) Greatest kinetic energy at the bottom while going the fastest

  15. Watch the juggler Michael Davis at Ford's Theater This theater is in Washington, D.C. President Abraham Lincoln was assassinated while watching a show from one of the upper balcony seats in this very same theater. President Ronald Reagan and his wife are enjoying this show. http://www.youtube.com/embed/n6mbW-jMtrY?feature=player_detailpage

  16. Thermal energy (heat)—the total motion of the atoms and molecules within a substance ex. Atoms move faster in hot water than ice Hot water-faster Ice-slower

  17. Gravitational potential energy—energy stored because of where it is placed (higher = more PE) (Depends on weight and height)

  18. Chemical energy —energy stored in the bonds of atoms and molecules (released during chemical changes)

  19. Electrical energy—energy of moving electrons

  20. Sound energy—energy caused by an object’s vibrations (It travels in waves but cannot move through empty space.)

  21. Radiant energy (light)—produced by the vibrations of electrically charged particles that travel in waves. Can travel through a vacuum (empty space) ex. Sunlight, X-rays, lamps, see p.636

  22. Nuclear energy—stored energy that comes from the nucleus of an atom. Released when atoms are split apart (fission) or joined together (fusion) ex. nuclear power plants

  23. Now you’ve got them all. Study them tonight!

  24. Resource websites: http://www.eia.doe.gov/kids/energy.cfm?page=about_forms_of_energy-basics http://www.bbc.co.uk/schools/ks2bitesize/science/physical_processes/