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Sound and Waves Unit Test Review

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  • Which travels faster: light or sound?
    light
  • If a wave goes around something that gets in the way, is that reflection, diffraction, or refraction?
    diffraction
  • What causes the refraction of a wave?
    density of the medium changing
  • The amount of energy found in a _____ wave can be found by comparing the size of the compression and rarefaction.
    longitudinal
  • What color do we see if all light is reflected?
    white
  • If a wave bends because the speed of the wave changes, is that reflection, diffraction, or refraction?
    refraction
  • Waves that need a medium are called ____.
    Mechanical
  • How is a light wave different from all mechanical waves?
    Light does not need a medium to travel
  • Why can't you hear sound in space?
    There is no air in space for sound to travel through (no medium)
  • A wave that has crests and troughs is what kind of wave?
    Transverse
  • What type of light passes through a prism and refracts into different colors?
    white light
  • What is being transferred with a wave?
    Energy
  • _____ is the distance between crest and crest OR trough to trough.
    Wavelength
  • Which type of wave does not need a medium to travel through?
    electromagnetic
  • _____ is how far the wave travels from the rest position.
    amplitude
  • Increasing the amplitude means you are increasing the _____ of a wave.
    energy
  • Through which state of matter do sound waves travel the fastest?
    solid
  • ____ is the number of vibrations that occur per second.
    Frequency
  • What is the highest point of a wave called?
    Crest
  • What is the unit for frequency?
    Hertz
  • A wave that has compressions and rarefactions is what kind of wave?
    Longitudinal
  • ____ describes what you actually hear?
    loudness
  • If a wave bounces off a surface, is it reflection, diffraction, or refraction?
    reflection
  • What is the lowest point of a wave called?
    trough