Across
- 1. heater
- 3. EM waves do not need a ________
- 9. gamma waves have the _______ frequency
- 11. visible light with the longest wavelength
- 12. kills cancer cells
- 13. see your teeth
- 15. rainbow
- 17. televisions
- 19. radio waves have the _______frequency
- 20. created by mixing the primary colors
- 21. EM waves are _____ waves
Down
- 2. EM waves are organized by wavelength and ______
- 4. cell phones
- 5. causes sunburn
- 6. colors: red, green, blue
- 7. light always travels in a _____ _____
- 8. the transfer of energy as EM waves
- 10. colors: cyan, magenta, yellow
- 14. gamma waves have the _______wavelength
- 16. visible light with the shortest wavelength
- 18. radio waves have the ______wavelength