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Eighth Grade (Grade 8) Waves and Sound Questions

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Grade 8 Waves and Sound
Which type of waves require a medium to travel, such as air, liquid, or metal?
  1. Electromagnetic waves
  2. Sound waves
  3. Radio waves
  4. Microwaves
Grade 8 Waves and Sound
The waves are interacting destructively.
Constructive Interference
  1. True
  2. False
Grade 8 Waves and Sound
Materials that are good absorbers of sound do not pass on vibration to other particles. This is called
  1. the threshold of hearing.
  2. a sound insulator.
  3. amplitude.
  4. pitch.
Grade 8 Waves and Sound
When a wave "bounces back", it is called                .
  1. refraction
  2. reflection
  3. reverberation
  4. vibration
Grade 8 Waves and Sound
The two main components of a sound wave are                            .
  1. reflection and refraction
  2. compression and refraction
  3. compression and rarefaction
  4. reflection and rarefaction
Grade 8 Waves and Sound
Wave speed is calculated by                 frequency and wavelength.
  1. multiplying
  2. dividing
  3. adding
  4. subtracting
Grade 8 Waves and Sound
Which of the following waves can be reflected?
  1. Water waves
  2. Sound waves
  3. Light waves
  4. All of the above
Grade 8 Waves and Sound
What is it called when the crests of two waves overlap and result in an increased wave amplitude?
  1. destructive interference
  2. constructive interference
  3. Doppler effect
  4. resonance
Grade 8 Waves and Sound
When you used a Foss-ulele over the top of a desk, what would happen to the pitch as you plucked the string while your partner pulled down and made the string tighter?
  1. As soon as you tightened the string, the pitch would get lower
  2. As soon as you tightened the string, the pitch would get higher
  3. The pitch would stay the same
Grade 8 Waves and Sound
Waves that move in a circular motion are                 waves.
  1. transverse
  2. longitudinal
  3. surface
  4. electric
Grade 8 Waves and Sound
The waves are interacting constructively.
Destructive Interference
  1. True
  2. False
Grade 8 Waves and Sound
Which of the following is an example of wave interaction?
  1. diffraction
  2. reflection
  3. refraction
  4. all of the above
Grade 8 Waves and Sound
The sound waves are classified as                      ?
  1. Transverse waves
  2. Ocean waves
  3. Longitudinal waves
  4. Electromagnetic waves
Grade 8 Waves and Sound
Sound waves travel as                      .
  1. Transverse waves
  2. Electromagnetic waves
  3. Longitudinal waves
  4. Gravitational waves
Grade 8 Waves and Sound
If a 100-kg student jumped in a pool from the same height as a 50-kg student, what would likely be true of their resulting waves?
  1. The larger student would create a wave with larger amplitude.
  2. The smaller student would create a wave with larger amplitude.
  3. The larger student would create a wave with larger wavelength.
  4. The smaller student would create a wave with larger wavelength.
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