Puzzle

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Across
  1. 2. an arrangement of numbers in a pattern used for solving mathematical problems
  2. 4. an instrument which use to find direction
  3. 5. subatomic particle with negative elementary electric charge
  4. 6. an apparatus for reducing or increasing voltage of alternating current
  5. 8. substance in the gas state
  6. 10. a flow of electron due to a potential different
  7. 11. water in solid state
  8. 12. a type of polymer used to make non-stick pans
  9. 14. energy that flows from a high temperature body to a low temperature body
Down
  1. 1. an equipment use to masseur the pressure
  2. 3. allows current to flow in one direction
  3. 7. react with acids and produce hydrogen gas
  4. 9. positive particle of matter that is part of the nucleus of an atom
  5. 13. a type of energy