Science 9 · Unit 6: Sound and space · Cambridge Lower Secondary Science Stage 9

Questions

1. 1. What does the amplitude of a sound wave tell you?

   • how loud it is
   • its pitch
   • how fast it travels
   • its colour
   Check

2. 2. What does the frequency of a sound wave tell you?

   • its amplitude
   • how loud it is
   • how far it travels
   • its pitch
   Check

3. 3. What does an oscilloscope do?

   • It makes sounds louder.
   • It records only the loudness of a sound.
   • It measures temperature.
   • It shows a graph of a sound wave picked up by a microphone.
   Check

4. 4. What is the unit of frequency?

   • newtons (N)
   • decibels (dB)
   • hertz (Hz)
   • metres (m)
   Check

5. 5. Zara plays four notes on a flute. Which wave produces the loudest sound?

   • D
   • B
   • C
   • A
   Check

6. 6. Which wave has the largest amplitude?

   • C
   • A
   • B
   • D
   Check

7. 7. Which wave produces the quietest sound?

   • B
   • D
   • C
   • A
   Check

8. 8. Which wave produces the highest pitch sound?

   • C
   • A
   • B
   • D
   Check

9. 9. Which wave produces the lowest pitch sound?

   • A
   • C
   • D
   • B
   Check

10. 10. Which wave has the highest frequency?

    • C
    • D
    • A
    • B
    Check

11. 11. On an oscilloscope, a wave gets taller, but has the same number of waves. What has changed?

    • It is louder, with the same pitch.
    • Nothing has changed.
    • It is lower pitched.
    • It is higher pitched and quieter.
    Check

12. 12. On an oscilloscope, the waves get closer together, but stay the same height. What has changed?

    • The pitch is lower.
    • It is louder.
    • The pitch is higher, and the loudness is the same.
    • It is quieter and lower.
    Check

13. 13. Air particles vibrate 0.5 mm forward and 0.5 mm back, 250 complete times each second. What is the amplitude?

    • 250 mm
    • 0.5 mm
    • 1.0 mm
    • 0.25 mm
    Check

14. 14. In the same sound wave, what is the frequency?

    • 0.5 Hz
    • 125 Hz
    • 500 Hz
    • 250 Hz
    Check

15. 15. A sound changes from 0.1 mm amplitude and 1200 Hz to 0.04 mm and 1500 Hz. How does it change?

    • It becomes quieter and higher pitched.
    • It becomes louder and higher pitched.
    • It becomes quieter and lower pitched.
    • It becomes louder and lower pitched.
    Check

16. 16. Arun plays a guitar note, then one with double the frequency. How does the sound change?

    • It sounds lower pitched.
    • It sounds higher pitched.
    • It sounds louder.
    • It sounds quieter.
    Check

17. 17. When the note has double the frequency, what happens to the guitar string's vibrations?

    • It vibrates half as many times each second.
    • It vibrates twice as many times each second.
    • It stops vibrating.
    • It vibrates twice as far.
    Check

18. 18. When the note has double the frequency, what happens to the air particles?

    • They vibrate twice as many times each second.
    • They stop moving.
    • They move away from the guitar.
    • They vibrate twice as far.
    Check