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5 Written questions

5 Matching questions

  1. interference
  2. medium
  3. diffraction
  4. frequency
  5. destructive interference
  1. a when waves cancel each other out
  2. b the meeting and combining of waves
  3. c the number of waves passing a fixed point in a certain amount of time; it is based partly on wavelength (longer wavelengths take a longer time to pass) and partly on the speed the wave travels
  4. d any substance that a wave moves through
  5. e the spreading out of waves through an opening or around the edges of an obstacle

5 Multiple choice questions

  1. electromagnetic wave; moves energy through space (sometimes empty space, sometimes through a medium - DOES NOT REQUIRE A MEDIUM)
  2. Radio, infrared (IR), light
  3. mirror (light waves), echo (sound waves), RADAR (radio waves)
  4. the bouncing back of a wave as it strikes a barrier
  5. Sound, ocean waves, earthquakes

5 True/False questions

  1. wavelength
    the distance from one wave crest to the very next crest. (This may also be measured from trough to trough.)

          

  2. 2 relationships for waves1) speed and frequency = directly proportional
    (as speed goes up, frequency goes up)
    2) wavelength and frequency = inversely proportional
    (as wavelength gets longer, frequency goes down)

          

  3. refraction examplesa straw looks "broken" when you look at it in a glass of water (because the light bends when it enters the water)

          

  4. constructive interferencewhen waves cancel each other out

          

  5. refractionthe bending of a wave as it enters a new medium at an angle other than 90 degrees