Hydrogen-Cell Cars

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Across
  1. 1. UK drivers that drive hydrogen-cell cars are exempt from paying a _ tax.
  2. 4. A type of energy that can be used to produce hydrogen fuel.
  3. 6. A type of energy that can be used to produce hydrogen fuel.
  4. 10. A type of energy that can be used to produce hydrogen fuel.
  5. 11. Hydrogen-cell vehicles produce _ emissions.
  6. 13. In Grove's Gas Voltaic Battery, glass tubes containing hydrogen and oxygen were submerged in _ acid.
  7. 15. FCEVs turn hydrogen into _.
  8. 17. Element used for the wiring.
  9. 18. Hydrogen and _ are combined to generate electricity.
  10. 20. Element used in the battery.
Down
  1. 2. Negatively-charged electrodes.
  2. 3. Toyota's hydrogen-cell model.
  3. 5. Most abundant element in the universe.
  4. 7. Number of hydrogen-fuel stations in the US.
  5. 8. Element used in the fuel cell stack.
  6. 9. What hydrogen-powered vehicles are categorized under.
  7. 12. When Grove's machine reversed _,it created an electrical current.
  8. 14. Besides hydrogen, FCEVs can also produce electricity through _.
  9. 16. Hydrogen gas passes through the _ and gets split into protons and electrons.
  10. 19. FCEVs release this from their exhausts.