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Frequency and amplitude of sound waves

6th grade (Year 7 in England) · 16 questions · Common Core: NGSS.MS-PS4-1 · England: KS3 Physics: Waves (sound)

Name

Date

Score/ 16

  1. Question 1

    A dog whistle produces sound at 2 kHz. What is this frequency in Hz? (1 kHz = 1000 Hz)

    AnswerHz

  2. Question 2

    On an oscilloscope, wave C has more waves squeezed into the same width as wave A. How does C sound?

    • A. higher pitched
    • B. lower pitched
    • C. silent
    • D. louder only

  3. Question 3

    A guitar string vibrates 3000 times in 3 seconds. What is the frequency of the sound, in hertz (Hz)?

    AnswerHz

  4. Question 4

    Humans can hear from about 20 Hz to 20 000 Hz. Could a young person hear a sound of 25 kHz?

    • A. yes
    • B. no, it is ultrasound

  5. Question 5

    Why can bats hear sounds that people cannot?

    • A. Bats hear only low frequencies
    • B. Their hearing range extends to much higher frequencies
    • C. They have bigger amplitude ears
    • D. Sound travels faster for bats

  6. Question 6

    A guitar string vibrates 750 times in 3 seconds. What is the frequency of the sound, in hertz (Hz)?

    AnswerHz

  7. Question 7

    Humans can hear from about 20 Hz to 20 000 Hz. Could a young person hear a sound of 5 kHz?

    • A. yes
    • B. no, it is ultrasound

  8. Question 8

    On an oscilloscope, wave C has more waves squeezed into the same width as wave A. How does C sound?

    • A. higher pitched
    • B. silent
    • C. lower pitched
    • D. louder only

  9. Question 9

    A guitar string vibrates 200 times in 2 seconds. What is the frequency of the sound, in hertz (Hz)?

    AnswerHz

  10. Question 10

    Humans can hear from about 20 Hz to 20 000 Hz. Could a young person hear a sound of 5 kHz?

    • A. yes
    • B. no, it is ultrasound

  11. Question 11

    On an oscilloscope, wave C has more waves squeezed into the same width as wave A. How does C sound?

    • A. lower pitched
    • B. higher pitched
    • C. silent
    • D. louder only

  12. Question 12

    A guitar string vibrates 100 times in 0.5 seconds. What is the frequency of the sound, in hertz (Hz)?

    AnswerHz

  13. Question 13

    Humans can hear from about 20 Hz to 20 000 Hz. Could a young person hear a sound of 50 kHz?

    • A. yes
    • B. no, it is ultrasound

  14. Question 14

    On an oscilloscope, wave C has more waves squeezed into the same width as wave A. How does C sound?

    • A. lower pitched
    • B. louder only
    • C. higher pitched
    • D. silent

  15. Question 15

    A guitar string vibrates 1760 times in 4 seconds. What is the frequency of the sound, in hertz (Hz)?

    AnswerHz

  16. Question 16

    Humans can hear from about 20 Hz to 20 000 Hz. Could a young person hear a sound of 50 kHz?

    • A. yes
    • B. no, it is ultrasound

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Answer key: Frequency and amplitude of sound waves

  1. 1. 2000 Hz

  2. 2. A. higher pitched

  3. 3. 1000 Hz

  4. 4. B. no, it is ultrasound

  5. 5. B. Their hearing range extends to much higher frequencies

  6. 6. 250 Hz

  7. 7. A. yes

  8. 8. A. higher pitched

  9. 9. 100 Hz

  10. 10. A. yes

  11. 11. B. higher pitched

  12. 12. 200 Hz

  13. 13. B. no, it is ultrasound

  14. 14. C. higher pitched

  15. 15. 440 Hz

  16. 16. B. no, it is ultrasound