Electromagnet crossword puzzle

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Across
  1. 5. Flow of electrons
  2. 6. holds energy or power
  3. 9. A unit of electric current
  4. 12. Thing that hammers pound
  5. 13. What pennies are made of
  6. 16. things that make other things magnetic
  7. 17. Invisible force field that surrounds magnets
  8. 19. Towards Louisianna
  9. 20. The thing that runs your car
  10. 21. What swords are made of
Down
  1. 1. A temporary magnet
  2. 2. Pressure that pushes electrons through current
  3. 3. Converts gas to energy
  4. 4. In red blood cells
  5. 7. Needle that spins freely
  6. 8. Where Santa Clause is located
  7. 10. attracts metal
  8. 11. worth five cents
  9. 12. Towards Canada
  10. 14. It is the thing that electricity runs through
  11. 15. A point in Earth's Northern Hemisphere
  12. 18. Like a river but for electricity