Puzzle

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