Physical Science, Chapter 18 (Part 1)

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Across
  1. 3. A whole-number multiple of a fundamental frequency is called a_______________ (p.428)
  2. 5. Frequencies above the range of human hearing are known as_____________ waves. (p. 434
  3. 8. Large speaker cones produce____________ frequencies than small speaker cones. (p. 430)
  4. 9. The particular sound of an instrument is its____________. (p. 423)
  5. 11. A _______________ is a region of a sound wave with high particle density. (p. 420)
  6. 12. Structure C is the ____________ membrane (or eardrum) which converts acoustic energy to kinetic energy by vibrating. (p. 427)
  7. 14. The eustachian tube helps to equalize the pressure on both sides of the____________. (p. 427)
  8. 15. A megaphone amplifies sound by focusing sound energy into one specific ____________. (p. 430)
  9. 17. Acoustic amplification is the process of making a sound______________ (p. 430)
  10. 18. Structure (G) is the_____________, where vibrations in a liquid transfer energy to thousands of sensory hair cells. (p. 427)
  11. 19. The unique __________ of an instrument depends on a combination of harmonics and overtones produced by its design, the manner in which it is played, and the materials from which it is made. (p. 428)
  12. 20. A guitar string has a fundamental frequency of 256 Hz. The frequency of its ____________ harmonic is 512 Hz? (p. 428)
  13. 21. Structures D, E, and F are the three bones of the middle ear, which include the hammer, anvil, and___________. (p. 427)
Down
  1. 1. Structure I, the _____________ nerve, relays sensory signals to the brain. (p. 427)
  2. 2. The muscle that controls the volume of air that passes over the vocal cords is the_______________ (p. 425)
  3. 4. A plucked guitar string produces a fundamental tone and_____________ at the same time. (p. 429)
  4. 6. Different pitches travel at the same __________. (p. 422)
  5. 7. As air temperature decreases, the speed of sound in air ______________. (p. 422)
  6. 10. As a person grows older, he typically loses the ability to hear____________ frequencies. (p. 422)
  7. 13. Echolocation, medical imaging, and nondestructive testing are applications of ___________ waves. (pp. 434-35)
  8. 16. The plucked string of a guitar makes very little___________ on its own. (p. 429)
  9. 17. Vocal cords are stretched across the ___________. (p. 425)