crossword

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Across
  1. 1. kinetic friction
  2. 3. What percent of the USA coal is exported
  3. 7. how does a meltdown occur
  4. 8. Name a type of fossil fuel
  5. 10. Since fossil fuels take hundreds of millions of years to form they are considered
  6. 12. why inset hydrogen used commonly used
  7. 14. fuel formed by mixing gasoline and alcohol
  8. 15. the prosses to make oil
  9. 16. comes from digging deep in the ground
  10. 18. wood plant manure waste
  11. 19. Turns a turbine
  12. 21. What is coals main use
  13. 23. oil When fuel is pumped from the ground
Down
  1. 2. a limitation to solar energy
  2. 4. when atoms fuse
  3. 5. What is oil mainly used for
  4. 6. Movement of electrons
  5. 9. is the least used energy
  6. 11. central core of an atom
  7. 13. is bio mass renewable
  8. 17. Compounds that make up oil
  9. 20. Why inset fusion commonly used today
  10. 22. what is the most efficient energy source
  11. 23. What gas is emitted from cars