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Eighth Grade (Grade 8) Waves and Sound Questions

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Grade 8 Waves and Sound
Locating objects by emitting sound waves and interpreting their echo is called                  .
  1. audio feedback
  2. audio orientation
  3. echolocation
  4. echo navigation
Grade 8 Waves and Sound
Gamma Rays are related to X-rays.
  1. True
  2. False
Grade 8 Waves and Sound
The frequency of a wave is measured in                       .
  1. Meters per second (m/s)
  2. Watts (W)
  3. Hertz (Hz)
  4. Joules (J)
Grade 8 Waves and Sound
                is an example of a mechanical wave.
  1. Radio waves
  2. X-rays
  3. Sound waves
  4. Light waves
Grade 8 Waves and Sound
What does the term "10x" represent in microscopy?
  1. The number of lenses in a microscope
  2. The size of the microscope
  3. The number of microorganisms visible
  4. The level of magnification
Grade 8 Waves and Sound
The speed of a wave can be calculated if                            and                            are given.
  1. Amplitude and wavelength
  2. Amplitude and frequency
  3. Wavelength and time period
  4. Wavelength and frequency
Grade 8 Waves and Sound
Albert Einstein gave Gamma Rays their name.
  1. True
  2. False
Grade 8 Waves and Sound
What is the main characteristic of a transverse wave?
  1. Particles of the medium vibrate in a back-and-forth motion
  2. Particles of the medium vibrate with an up-and-down motion
  3. Particles of the medium move in circular patterns
  4. Particles of the medium move parallel to the direction of energy motion
Grade 8 Waves and Sound
Light bends as it travels from air into water because
  1. light speeds up as it travels from air into water and causes it to change direction.
  2. the density of water is more than air and this makes light speed up.
  3. light slows as it travels from air into water causing it to change direction.
Grade 8 Waves and Sound
                      wave requires a medium for propagation.
  1. Transverse waves
  2. Longitudinal waves
  3. Surface waves
  4. Electromagnetic waves
Grade 8 Waves and Sound
Which of the following is NOT an example of a transverse wave?
  1. Ripples on the surface of the water
  2. Vibrations in strings
  3. Sound waves
  4. Light waves
Grade 8 Waves and Sound
The wavelength of a sound wave represents                                                           .
  1. the speed at which a wave travels
  2. the frequency of the sound wave
  3. the amplitude of the sound wave
  4. the distance between adjacent compressions and rarefactions
Grade 8 Waves and Sound
The waves are interacting destructively.
Destructive Interference
  1. True
  2. False
Grade 8 Waves and Sound
Which range of the electromagnetic spectrum are lasers most commonly employed in?
  1. Microwaves
  2. Ultraviolet
  3. Visible and near-infrared
  4. X-rays
Grade 8 Waves and Sound
Particles of what type of material do not allow light to transmit through it?
  1. opaque
  2. translucent
  3. transparent
Grade 8 Waves and Sound
Refraction occurs when a wave                                                          .
  1. passes through a medium without any change
  2. bounces back from an obstacle
  3. bends as it passes from one medium to another at an angle
  4. spreads out when it encounters a new medium
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