review

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Across
  1. 3. on the stair step line
  2. 6. a smell
  3. 10. sound waves are these
  4. 11. red, orange, yellow, green, blue, purple
  5. 12. on the right of the stair step line
  6. 14. properties we can see
  7. 15. from one point of the wave to another
  8. 19. conducts electricity
  9. 20. what is faster light or sound waves
  10. 21. negativity charged part of an atom
Down
  1. 1. water turning into water vapor
  2. 2. energy in motion
  3. 4. converts electrical energy into mechanical energy
  4. 5. rusting is a
  5. 7. on the left of the stair step line
  6. 8. in the nucleus these are positive
  7. 9. a year
  8. 13. the neutral charged part of an atom
  9. 16. converts mechanical energy into electrical energy
  10. 17. a day
  11. 18. water in the form of ice is a