Test review #2

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Across
  1. 1. inclined plane wrapped around a cylinder
  2. 3. carries signals from the retina to the brain
  3. 5. longitudinal wave that travels through matter
  4. 6. moving energy
  5. 8. flat sloped surface
  6. 10. simple machine that pivots around a fixed point
  7. 11. part of the ear that contains the ear drum
  8. 13. clear part of sclera
  9. 17. receives light and has light sensitive cells
  10. 18. narrow beam of light
  11. 19. shaft attached to a wheel of a larger diameter
  12. 20. part of the ear that converts sound to nerve signals
  13. 21. allows almost all light to pass through
  14. 23. perception of how high or low a sound seems
  15. 24. white covering on eye
Down
  1. 1. describes machine that does work in one movement
  2. 2. nonmoving energy
  3. 4. first part of the ear that sound hits
  4. 7. describes 2 or more simple machines working together
  5. 9. allows most light to pass through
  6. 12. scale that sound is measured on
  7. 14. allows no light to pass through
  8. 15. ratio of output work to input work
  9. 16. inclined plane that moves
  10. 20. controls amount of light entering eye
  11. 22. grooved wheel with a rope or cable attached