Sound Quiz - ICSE Class 8 Science
Free practice quiz: Sound (ICSE Class 8 Science). 51 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
This ICSE Class 8 Science practice quiz has 51 multiple-choice questions on Sound, and 51 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.
Start quiz: 51 questions, freeSample questions
Which of the following characteristics of sound determines its loudness?
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Answer: B. Amplitude
Loudness of a sound is directly related to its amplitude. Higher amplitude corresponds to a louder sound, and lower amplitude corresponds to a softer sound.
The phenomenon of 'beats' in sound occurs when:
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Answer: C. Two sound waves of slightly different frequencies interfere.
Beats are produced by the superposition of two waves of nearly equal frequencies. The resulting sound intensity varies periodically, creating a 'wavering' effect.
What is the audible range of human hearing?
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Answer: A. 20 Hz to 20,000 Hz
The typical range of frequencies that humans can hear is from approximately 20 Hertz (Hz) to 20,000 Hertz (20 kHz).
Which instrument utilizes the principle of resonance to produce a continuous musical tone?
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Answer: C. Flute
A flute produces sound by blowing air across an opening. The air column inside the flute vibrates at its natural frequencies, and by changing the length of the air column (using keys), different resonant frequencies are produced, creating different notes.
If a sound source is moving away from a stationary observer, the observed frequency will be:
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Answer: B. Lower than the emitted frequency
According to the Doppler effect, when the source of sound moves away from the observer, the observed frequency decreases, resulting in a lower pitch.
More questions in this quiz
Answers and explanations are in the full quiz.
- A sound wave travels through a medium. What does the frequency of the sound wave represent?
- When sound travels from air to water, what property of the sound wave remains unchanged?
- Which of the following phenomena explains why the sound of a distant thunderstorm reaches us after we see the lightning?
- The unit of intensity of sound is:
- Which property of sound allows us to distinguish between a flute and a violin playing the same note at the same loudness?
- Sound waves are:
- An object vibrates at a frequency of 50 Hz. What is the time period of its vibration?
- What term describes the phenomenon where sound waves bounce off a surface?
- Which of the following instruments is designed to detect very faint sounds, often by amplifying them?
- Which of the following is a characteristic of infrasound?
- What is the primary function of the eardrum (tympanic membrane) in the human ear?
- Which of the following best describes resonance?
- A sonar system uses which type of wave to detect objects underwater?
- What is the relationship between the speed of sound, its frequency, and its wavelength?
- When sound travels from a denser medium to a rarer medium, its speed generally:
- The phenomenon of an echo is a result of:
- Which of the following sounds would have the highest pitch?
- Which material is most likely to absorb sound effectively?
- When sound waves pass through a narrow opening or around an obstacle, they tend to spread out. This phenomenon is called:
- The 'quality' of a musical note refers to:
- An orchestra tuning up before a performance often produces a cacophony of sounds. This is an example of:
- Which of the following statements about the speed of sound is true?
- If the amplitude of a sound wave increases, what happens to the perceived loudness?
- What is the term for sound waves with frequencies higher than the upper limit of human hearing?
- A sound wave has a wavelength of 2 meters and a frequency of 170 Hz. What is the speed of sound in this medium?
- Which of the following is NOT a medium through which sound can travel?
- A person shouts in a large hall and hears an echo after 2 seconds. If the speed of sound is 340 m/s, how far is the reflecting surface?
- The intensity of sound decreases with the square of the distance from the source. This is an example of:
- A siren of an ambulance is moving towards a stationary observer. The observer will hear the siren's pitch as:
- Which part of the human ear converts mechanical vibrations into electrical signals that are sent to the brain?
- Which factor does NOT affect the speed of sound in a gas?
- When two sound waves interfere constructively, the resulting sound is:
- Which of the following is a characteristic of reverberation?
- The time it takes for a sound wave to complete one full cycle of vibration is called its:
- A sound wave of frequency 200 Hz travels at 340 m/s. What is its wavelength?
- What property of sound is measured in decibels (dB)?
- Which part of the sound wave is responsible for the perceived pitch?
- When sound waves encounter a soft, porous material, they are most likely to be:
- The phenomenon where sound waves bounce off surfaces and come back to the listener with a slight delay is called:
- Which of the following units is used to measure the loudness of sound?
- A musician plays a note on a piano. The sound produced is a combination of a fundamental frequency and several overtones. The presence and relative intensity of these overtones determine the:
- If a vibrating object completes 120 vibrations in 10 seconds, what is its frequency?
- Which physical property of the medium is most directly related to the speed of sound?
- The process by which sound waves are bent or spread out when they pass through an opening or around an edge is known as:
- Which of the following terms describes the phenomenon that allows us to hear sound from a distance, like an echo?
- The human ear is most sensitive to sounds in which frequency range?
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