science

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Across
  1. 3. – To remove or add electrons to an atom
  2. 5. – Part of the “CAT scan,” a medical imaging method
  3. 6. – Toll system that uses RFID to read vehicles
  4. 8. – A shape that splits white light into colors
  5. 9. – Barcode system using lines read by a scanner
  6. 12. – System that detects objects using radio waves
  7. 15. – High-energy wave used for imaging bones
  8. 16. – Unit used to measure frequency
  9. 19. – EM waves felt as heat
  10. 20. – Scan that uses strong magnets and radio waves
  11. 21. – Light color with the longest wavelength
  12. 22. – A measure formed by two lines meeting at a point
  13. 24. – EM wave that can cause sunburn
  14. 27. – Short for microwaves, used in ovens and radar
  15. 28. – Energy traveling as waves or particles
  16. 29. – Long-wavelength EM waves used for broadcasting
  17. 31. – A lamp that gives off ultraviolet light
  18. 33. – The visible part of the electromagnetic spectrum
  19. 34. high** – Frequency range used for TV broadcasting and mobile phones
  20. 35. – When light bends as it moves into a new medium
  21. 37. – The distance between two matching points on a wave
Down
  1. 1. – EM waves with the highest frequency
  2. 2. – A space with no matter, where light travels fastest
  3. 4. – A straight line that shows the direction of light
  4. 7. high** – Frequency range used in FM radio and TV signals
  5. 10. – The range of all EM waves
  6. 11. – How many waves pass a point each second
  7. 13. – Navigation system that uses satellite signals
  8. 14. – When light bounces off a surface
  9. 16. – The height of a wave from its rest position
  10. 17. – Scientist who described the behavior of electromagnetic waves
  11. 18. – The part of the EM spectrum with short wavelengths
  12. 23. – The part of the spectrum humans can see
  13. 25. – Light color with the shortest wavelength
  14. 26. – Any material that a wave travels through
  15. 30. – Science prize given for major discoveries
  16. 31. – Tag technology that uses radio waves for scanning
  17. 32. – A tiny packet of light energy
  18. 36. – The part of the EM spectrum with long wavelengths