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Sound (Grade 4)

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Sound

1. 
The loudness of a sound is called
  1. the sound wave
  2. the volume
  3. the amplitude
  4. the pitch
2. 
What happens to a sound if the frequency of the vibrations increases?
  1. The pitch increases
  2. The volume decreases
  3. The sound echos
  4. The sound gets louder
3. 
A                 is the sound your hear when something is moving faster than the speed of sound.
  1. vibration
  2. pitch wave
  3. high pitch
  4. sonic boom
4. 
Sound waves cannot travel through
  1. a solid
  2. gases
  3. empty space
  4. liquids
5. 
As the frequency of a sound wave increases, the wavelength                .
  1. decreases
  2. stays the same
  3. increases
  4. fluctuates
6. 
If a sound's pitch is high, its source is
  1. an echo
  2. vibrating quickly
  3. nearby
  4. a sonic boom
7. 
Which of the following is a characteristic of sound waves?
  1. A medium is necessary for the waves to travel.
  2. The waves are transverse.
  3. Different types can be compared on the electromagnetic spectrum.
  4. They travel faster than other waves.
8. 
The harder you strike a drum, the greater the sound's
  1. pitch
  2. medium
  3. volume
  4. frequency
9. 
Which of the following best shows how sound waves travel?
  1. a branch moving back and forth
  2. a car speeding up and down hills
  3. a baseball hit by a bat
  4. a marble dropped in a bowl of water
10. 
The unit of frequency is measured in hertz.
  1. True
  2. False
11. 
Wave speed is calculated by                                     .
  1. multiplying frequency and wavelength
  2. dividing frequency and wavelength
  3. adding frequency and wavelength
  4. subtracting frequency and wavelength
12. 
When you make sounds by plucking a rubber band, you make the rubber band move back and forth very quickly. This movement is called
  1. loudness
  2. amplitude
  3. pitch
  4. vibration
13. 
A reflection of sound is an                .



14. 
When a wave source is moving toward or away from an object, the wavelength changes, a phenomenon known as the                                   .
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