Energy cross word

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Across
  1. 3. used to communicate with another person
  2. 5. does not let us float in air
  3. 6. something that flows through wires
  4. 7. provides warmth for any living thing.
  5. 8. it can be used to harm or it can be used to recharge your mobile
  6. 11. keeps earth is orbit
  7. 12. unit used to measure heat
  8. 13. unit to measure the amount of electricity
  9. 14. something which is in motion
  10. 15. uses the light of the sun to make electricity
  11. 17. humans need it to live
  12. 18. unit to measure sound
Down
  1. 1. when the atom is split it makes a huge reaction.
  2. 2. when two of them are put very close together they attract immediately
  3. 4. has the ability to do something
  4. 6. what this whole crossword puzzle is all about
  5. 9. it is used in everyday house hold appliances
  6. 10. unit for measuring magnetic energy
  7. 15. gives us light and heat
  8. 16. its the travel of photons