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