PiottiR Pd.7 science

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Across
  1. 3. a substance that provides energy
  2. 6. another name for oil
  3. 13. reducing energy use
  4. 14. rods used to slow down chain reactions when the reactor vessel gets too hot
  5. 20. a layer of material that traps air
  6. 21. three needs for fuel are transportation, heating and cooling, and
  7. 23. can be replenished in a short amount of time
  8. 24. breaking apart
  9. 25. electricity produced by flowing water
  10. 26. compounds that are made from oil
  11. 28. energy rich substances formed from the remains of organisms
  12. 29. the percentage of energy that is actually used to perform work
  13. 30. the part of the nuclear reactor where nuclear fission occurs
Down
  1. 1. the three major types of fossil fuels are oil, natural gas, and
  2. 2. what does wind, flowing water, and steam turn
  3. 4. light and heat given off by the sun
  4. 5. coming together
  5. 7. what is oil mainly used for
  6. 8. a factory in which crude oil is heated and separated into fuels and other products
  7. 9. adding alcohol to gasoline forms this mixture
  8. 10. rods in the reactor
  9. 11. cannot be replenished in a short amount of time
  10. 12. a change from one form of energy to another
  11. 15. chemical compounds that contain carbon and hydrogen atoms
  12. 16. heat from earth's interior
  13. 17. wood, plant parts, manure, and food wastes that can be used for fuels
  14. 18. what is coal mostly used for
  15. 19. the central core of an atom
  16. 22. through what can stored chemical energy be released
  17. 27. what is the melting of fuel rods called