Puzzle

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