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CSEE (Form 4) Sound — practice questions

Explore 4 free Sound questions in CSEE (Form 4) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Sound questions and exercises with answers

Showing questions 1–4 of 4.

Through which state of matter does sound travel fastest?Read the answer and worked solution →Which property of a sound wave does your ear understand as pitch?Read the answer and worked solution →Which range of frequencies can a healthy human ear detect?Read the answer and worked solution →Astronauts orbiting the Moon watch an explosion on the surface but hear nothing at all. What explains this?Read the answer and worked solution →

Worked practice questions

Through which state of matter does sound travel fastest?

  1. Through a liquid
  2. Through a solid
  3. Through a gas
  4. Through a vacuum
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Correct answer: B. Through a solid

1. Sound is passed on by particles pushing against their neighbours. 2. The closer the particles sit, the faster that push is handed on. 3. Sound travels faster in solids than in liquids, and faster in liquids than in gases. 4. A vacuum has no particles at all, so sound cannot pass through it. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 10: Sound_

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Which property of a sound wave does your ear understand as pitch?

  1. Its amplitude
  2. Its wave speed
  3. Its frequency
  4. Its wavelength
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Correct answer: C. Its frequency

1. A bird chirp sounds high and a lion roar sounds low. 2. The frequency of a sound wave is what your ear understands as pitch. 3. A higher frequency gives a higher pitch and a lower frequency gives a lower pitch. 4. The amplitude sets how loud the sound is, not how high or low it sounds. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 10: Sound_

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Which range of frequencies can a healthy human ear detect?

  1. 2 Hz to 2 000 Hz
  2. 200 Hz to 2 000 Hz
  3. 20 Hz to 200 000 Hz
  4. 20 Hz to 20 000 Hz
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Correct answer: D. 20 Hz to 20 000 Hz

1. The ear does not respond to every frequency of pressure wave. 2. Frequencies from 20 to 20 000 hertz are audible to the human ear. 3. Below that band the sound is called infrasound and cannot be heard. 4. Above that band the sound is called ultrasound, which some animals hear but people do not. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 10: Sound_

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