chapter 17

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Across
  1. 6. splitting of an atoms nucleus into two smaller nuclei
  2. 9. energy that holds particles together
  3. 12. energy nearly always available
  4. 13. extraction of a mineral by removing a strip
  5. 15. generates electricity
  6. 16. digging shafts deep into the ground
  7. 19. deposits of moist sand and clay
  8. 20. fuel rods produced so much heat that they melted
  9. 21. radioactive material left over
  10. 22. energy made available by electric charge
  11. 23. small nucli of lightweight elements
Down
  1. 1. fuel burns it combines rapidly with oxygen
  2. 2. exposed rock surfaces react with oxygen
  3. 3. how much of the energy put into a system
  4. 4. is an icelike solid
  5. 5. dark liquid fossil fuel
  6. 7. chemical compounds that are derived from oil
  7. 8. practice of reducing energy use to meet those goals
  8. 10. energy an object has due to position or shape
  9. 11. energy that an object has due to its motion
  10. 14. is the ability to do work
  11. 17. energy cannot be replaced
  12. 18. rock filled with a mixture of hydrocarbons