science cross word done with ellie

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Across
  1. 1. what microwaves do off the metal
  2. 4. imaging for broken bones
  3. 7. used for tanning beds
  4. 10. A molecule that has a distinct positive and negative side
  5. 14. tube where x-rays come from
  6. 15. excites electrons
  7. 16. applying force
  8. 18. length distance from wave to wave
  9. 19. used for thermal imaging cameras
  10. 20. charged particles (energy) that can move through empty space by alternating moving through the electric and magnetic fields
Down
  1. 2. number of wave crests in a certain amount of time
  2. 3. absorbs microwave radiation
  3. 5. used for aircraft navigation
  4. 6. used to destroy cancer cells
  5. 8. how tall the waves are
  6. 9. microwaves blast these to heat up your food
  7. 11. used to detect speeding cars
  8. 12. denser on the outside, so it doesn't get heated by microwaves
  9. 13. shoots out microwaves
  10. 17. how many different types of waves are there?