Science Unit 2

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Across
  1. 3. Cell phones send and receive data using ____.
  2. 6. a lens that caves inward; makes images smaller
  3. 9. comes after microwaves on the electromagnetic spectrum
  4. 10. All waves need a _______ to travel through
  5. 12. lowest point on a wave
  6. 13. A tool used to separate light into the colors of the spectrum
  7. 14. to produce or give off light, like the sun and fire
  8. 15. the bending of light as it passes through a material
  9. 16. A type of lens that makes things appear bigger.
  10. 17. Mechanical waves need a ______ to travel through.
Down
  1. 1. the number of pixels used to create an image; can be high or low
  2. 2. distance between two crests
  3. 4. These waves don't need a medium and can travel through space; always transverse
  4. 5. noise cancelling headphones use _____ interference to cover up noise.
  5. 7. highest point on a wave
  6. 8. small dots of color on a computer display that make images
  7. 11. distance between the midline of a wave and the crest
  8. 15. acronym used to remember the colors of the spectrum in order