Ch 4 8 Science Drennan

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Across
  1. 2. An electromagnetic wave with a slightly shorter wavelength and higher frequency than light.
  2. 4. The amount of energy that passes through a square meter of space in one second.
  3. 6. The region of a longitudinal wave where the particles are farthest apart.
  4. 10. The region of a longitudinal wave where the particles of the medium are closest together.
  5. 11. The unit used to measure sound intensity, or loudness
  6. 12. Is the maximum distance a wave varies from its rest position.
  7. 13. A material that allows most of the light that str4ikes it to pass through, but through which objects appear blurry.
  8. 16. A wave in which the disturbance is perpendicular to the direction the wave travels.
  9. 17. A material that allows almost all of the light striking it to pass through, and through which objects can be seen clearly.
  10. 18. A meterial through which light does not pass.
Down
  1. 1. The perception of how high or low a sound seems.
  2. 3. A wave that makes the particles of a medium move back and forth parallel to the direction the wave travels.
  3. 5. A low-frequency, low-energy electromagnetic wave that has a wavelength longer than about 30 cm.
  4. 7. A wave that travels only through matter.
  5. 8. A wave that can travel through empty space or through matter.
  6. 9. The change in direction of a wave as it changes speed, moving from one medium into another.
  7. 14. The number of wavelengths that pass a point each second.
  8. 15. An electromagnetic wave with a wavelength shorter than a microwave but longer then light.