CK-12 Physical Science Concepts - For Middle School

http://www.ck12.org Chapter 5. Energy

5.93 References

1. Sudhamshu Hebbar. Child playing tennis. CC BY 2.0


2. Marco Molino (Flickr: emmequadro61). Runners have kinetic energy. CC BY 2.0


3. Heisenberg Media. Bowling balls have kinetic energy. CC BY 2.0


4. Sled: Michael Rhode (Flickr: mgrhode1); Gymnast: Alasdair Middleton. Both the sled and the gymnast have
   gravitational potential energy. Sled: CC BY 2.0; Gymnast: CC BY 2.0


5. Flickr: lobo235. This pogo stick stores energy in its spring. CC BY 2.0


6. Neeta Lind.. CC BY 2.0


7. Damir Z (Flickr: sidonath). Drummers generate mechanical energy to hit drums and cymbals. CC BY 2.0


8. Amplifier: Tim Walker; Battery: Emilian Robert Vicol. Portable amplifiers have batteries that store chemical
   energy. Amplifier: CC BY 2.0; Battery: Public Domain


9. Image copyright dwphotos, 2014. Electrical energy is used to power these bright lights. Used under license
   from Shutterstock.com


10. Tony Alter (Flickr: Tobyotter). Thermal energy is generated when people exercise. CC BY 2.0


11. Brad Hammonds (Flickr: zbdh12).. CC BY 2.0


12. Frédéric BISSON. Energy transfer to popcorn in a popcorn machine. CC BY 2.0


13. Nat Tarbox. Water slides convert gravitational potential energy into kinetic energy. CC BY 2.0


14. Left: Paul Kretek (Flickr: pa*kr); Center: Edison; Right: Kid Clutch (Flickr: Graf Spee). Various types fossil
    fuels. Left: CC BY 2.0; Center: Public Domain; Right: CC BY 2.0


15. Christopher Auyeung. Pollutants released by fossil fuels. CC BY-NC 3.0


16. Boyd Norton. Windmills have been used for centuries. Public Domain


17. Mike Spasoff. Solar panels can generate enough electricity to power homes. CC BY 2.0


18. L. Richard Martin Jr.. Hoover Dam. CC BY 2.0


19. Dan Davison (Flickr: Mostly Dans). Combine harvester grinding plants to produce ethanol. CC BY 2.0


20. ThinkGeoEnergy. Geothermal plant producing electricity. CC BY 2.0


21. Courtesy of the U.S. Energy Information Administration. Circle graph of energy sources for the United States.
    Public Domain


22. Christopher Auyeung. Bar graph illustrating oil use by country. CC BY-NC 3.0


23. Cem K. (iyiinsan) and Doga. Subways help conserve transportation energy. CC BY 2.0 ̆


24. Courtesy of the U.S. Environmental Protection Agency. Energy Star logo. Public Domain


25. left: Simon Doggett; right: Flickr:EscapadaRural. High temperature compared to high thermal energy. CC
    BY 2.0


26. User:Gringer/Wikimedia Commons. Illustration of a thermometer. Public Domain


27. Zachary Wilson. Diagram illustrating transfer of thermal energy. CC BY-NC 3.0


28. Simon Cousins. Ice cubes in cola cause the cola to lose thermal energy. CC BY 2.0


29. Iron: Flickr:osseous; Cold hands: Jason Rogers; Camp stove: Simon Q (Flickr:simononly); Feet in snow:
    Flickr:woodleywonderworks. Other common examples of conduction. CC BY 2.0


30. Zachary Wilson. Diagram illustrating how heat is transferred in a boiling pot. CC BY-NC 3.0


31. Zachary Wilson. Diagram illustrating convection currents in an ocean. CC BY-NC 3.0


32. Zachary Wilson. Exercise for drawing direction of convection currents created by a radiator. CC BY-NC 3.0


33. Zachary Wilson. Diagram illustrating heat transfer by radiation. CC BY-NC 3.0


34. Janet McKnight. Thermal camera view of house. CC BY 2.0


35. Dominic Alves. Metal radiators quickly heat up. CC BY 2.0


36. Skiers: PhareannaH (Flickr:berhabuk); Feathers: Al Pavangkanan. Insulators help snowsuits keep heat in. CC
    BY 2.0


37. Ryan McFarland. Home insulation helps reduce unwanted heat loss. CC BY 2.0