Waves Activity 1 and 2

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Across
  1. 2. A purpose which a particular thing can perform.
  2. 4. Regions of low air pressure. Areas where the air molecules are spread out
  3. 7. The region of the wave in which the material through which the wave is transmitted is pressed together. For sound, compressions are regions of high pressure.
  4. 8. A unit of measurement for frequency. It is equivalent to one cycle per second.
  5. 9. a unit that expresses the relative measure of the intensity.
Down
  1. 1. a physical measurement of how much sound energy passes through a certain area in a certain amount of time as it spreads
  2. 3. a set of repeating things or events.
  3. 5. The number of times an event repeats in a given time. For sound it is the number of vibrations per second.
  4. 6. shape, composition, construction) of an object or living thing determines many of its properties