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Sound Propagation

Physics ⇒ Waves and Sound

Sound Propagation starts at 7 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Sound Propagation. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 7
A bell is ringing inside a jar. When the air is removed from the jar, the sound becomes faint and eventually stops. Why?
A person shouts across a canyon and hears an echo. What causes the echo?
Describe what happens to the particles of a medium when a sound wave passes through it.
Describe what is meant by 'compression' and 'rarefaction' in a sound wave.
A bell is ringing inside a jar. When the air is removed from the jar, the sound becomes faint and eventually stops. Why?
A person shouts across a canyon and hears an echo. What causes the echo?
A submarine uses sonar to detect objects underwater. If the speed of sound in seawater is 1500 m/s and the sonar pulse returns in 4 seconds, how far away is the object?
Explain why sound is not heard immediately after a distant explosion, but light from the explosion is seen instantly.
Sound travels fastest in which of the following? (1) Solids (2) Liquids (3) Gases (4) Vacuum
Which of the following best describes how sound travels? (1) In straight lines only (2) As electromagnetic waves (3) As longitudinal waves (4) As transverse waves
Which of the following is an example of sound absorption? (1) Echo in a canyon (2) Carpeted room being quiet (3) Sound traveling through steel (4) Sound traveling in air
Which of the following is necessary for sound to be heard? (1) A source of vibration (2) A medium (3) A receiver (4) All of the above
Fill in the blank: Sound is produced by ______ objects.
Fill in the blank: The ______ is the part of the ear that vibrates when sound waves hit it.
Fill in the blank: The ______ is the softest part of the human ear that vibrates to transmit sound.
Fill in the blank: The ______ of a sound wave determines how loud or soft the sound is.
True or False: Sound can be produced without vibration.
True or False: Sound can travel through a vacuum.
True or False: Sound can travel through liquids.
True or False: Sound travels in all directions from its source.