Voice of which of the following is likely to have minimum frequency:
- ✓Baby girl
- BBaby boy
- CA man
- DA woman
Answer: A.
View full solution →Question types
Sound question types
441 questions across 10 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
441
Questions
10
Question groups
5
Question types
01
M.C.Q. [I MARKS]
210 Q→02Give the definition [1 M]
16 Q→03Fill in the blanks: [1 M]
10 Q→04questions in short. [2 marks ]
48 Q→05scientific reasons[2 marks ]
6 Q→06true or false. [1 M]
22 Q→07questions in short. [3 marks ]
24 Q→08questions in details [4 marks ]
13 Q→09questions in on sentence. [1 M]
88 Q→10case /data -based (4 Marks)
4 Q→Sample Questions
Sound questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Sound can travel through:
- AGases only
- BSolids only
- CLiquids only
- ✓Solids, liquids and gases
Answer: D.
View full solution →The number of vibrations made by a vibrating body in one second is.
- ✓Frequency
- BNoise
- CLoudness
- DPitch
Answer: A.
View full solution →Read the following sentences carefully, and choose the incorrect one:
- AThe speed of sound in air is $340$ meters per second.
- BThe speed of sound in water is $1500$ meters per second.
- CSound travels at a speed of $5000$ metres per second through iron or steel.
- ✓None of the above.
Answer: D.
View full solution →$1$ hertz is equal to:
- A$1$ Vibration per minute
- B$10$ Vibrations per minute
- ✓$60$ Vibrations per minute
- D$600$ Vibrations per minute
Answer: C.
View full solution →Windpipe
Voice Box
Vibration
Time Period
Shrillness
Fill in the following blanks with suitable words: Sound which is pleasing to the ear is called $............$ sound.
View full solution →Fill in the following blanks with suitable words: Sounds are produced by $............$ objects.
View full solution →Fill in the following blanks with suitable words: The unit of frequency is $............$
View full solution →Fill in the following blanks with suitable words: The human voice box is called $............$
View full solution →Fill in the following blanks with suitable words:The shrillness of a sound is determined by the $............$ of vibration.
View full solution →An alarm bell is kept inside a vessel as shown in Figure. A person standing close to it can distinctly hear the sound of alarm. Now if the air inside the vessel is removed completely. how will the loudness of alarm get affected for the same person?
What is a musical sound? Give two examples of musical sounds.
Why the voices of men, women and children are different$?$
View full solution → How does sound from a sound producing body travel through air to reach our ears?
What is meant by the $(a)$ 'pitch' of sound, and $(b)$ 'quality' of sound$?$
View full solution →Two persons cannot communicate with each other on the moon.
When the tablespoon is gently struck to the metallic tumbler, it produces feeble sound and when it is struck with a greater force, it produces louder sound.
The sound produced by a mosquito is quite different from roar of a lion.
The sound cannot travel through vacuum.
Trees must be planted along the road.
State whether the following statements are true or false: If the amplitude of vibrations is large, sound is feeble.
State whether the following statements are true or false: The number of oscillations per second of a vibrating object is called its time-period.
State whether the following statements are true or false: Sound cannot travel in vacuum.
The pitch of a sound depends in the frequency of the waves.
The sound could not travel in solid.
List sources of noise pollution in your surroundings.
What is the difference between noise and music? Can music become noise sometimes?
Identify the part which vibrates to produce sound in the following instruments.
$a.$ Dholak.
$b.$ Sitar.
$c.$ Flute.
View full solution →$a.$ Dholak.
$b.$ Sitar.
$c.$ Flute.
A pendulum oscillates $40$ times in $4$ seconds. Calculate its.
$a.$ time$-$period, and
$b.$ frequency.
Can we hear the sound produced by the oscillations of this pendulum? Give reason for your answer.
View full solution →$a.$ time$-$period, and
$b.$ frequency.
Can we hear the sound produced by the oscillations of this pendulum? Give reason for your answer.
Sketch larynx and explain its function in your own words.
Give any four sources of sound in a market place.
Give two examples of each of the following:
$a.$ Stringed musical instruments.
$b.$ Wind musical instruments.
$c.$ Membrane musical instruments.
$d.$ Plate type musical instruments.
View full solution →$a.$ Stringed musical instruments.
$b.$ Wind musical instruments.
$c.$ Membrane musical instruments.
$d.$ Plate type musical instruments.
A pendulum oscillates $40$ times in $4$ seconds. Find its time period and frequency.
View full solution →Draw a labelled diagram of larynx and explain its functions.
Describe how sound is produced by the human voice box (or larynx).
The sound from a mosquito is produced when it vibrates its wings at an average rate of $500$ vibrations per second. What is the time period of the vibration?
View full solution →Fill in the blanks with suitable words. Shrillness of a sound is determined by the _________ of vibration.
Fill in the blanks with suitable words. Unwanted sound is called _________.
Fill in the blanks with suitable words. The unit of frequency is _________.
Fill in the blanks with suitable words. Loudness is determined by the ________ of vibration.
Aditi hangs four steel dishes of the same size but different thickness.
She hits each of them with an iron rod.
$8.$ The thicker the dish, the lower will be the vibration.
Which dish will produce the loudest sound when hit$?$
$A.$ Dish $1$
$B.$ Dish $2$
$C.$ Dish $3$
$D. $ Dish $4$
$9.$ Which of these statements proves that sound can travel through solids$?$
$A.$ We can hear the sound of wind.
$B.$ We can hear the sound of lightning.
$C.$ We can hear a bell ringing from a distance.
$D.$ We can hear heartbeats by using a stethoscope.
$10.$ Which part of the human ear vibrates on receiving sound waves$?$
$A.$ Ear lobe
$B.$ Eardrum
$C.$ Inner ear
$D.$ Ear canal
View full solution →She hits each of them with an iron rod.
| Dish $1$ | Dish $2$ | Dish $3$ | Dish $4$ | |
| Thickness of dish | $1\ mm$ | $1.5\ mm$ | $0.5\ mm$ | $2\ mm$ |
Which dish will produce the loudest sound when hit$?$
$A.$ Dish $1$
$B.$ Dish $2$
$C.$ Dish $3$
$D. $ Dish $4$
$9.$ Which of these statements proves that sound can travel through solids$?$
$A.$ We can hear the sound of wind.
$B.$ We can hear the sound of lightning.
$C.$ We can hear a bell ringing from a distance.
$D.$ We can hear heartbeats by using a stethoscope.
$10.$ Which part of the human ear vibrates on receiving sound waves$?$
$A.$ Ear lobe
$B.$ Eardrum
$C.$ Inner ear
$D.$ Ear canal
Which of these is true about the four sound waves$?$
Circle ‘Yes’ or ‘No’ to mark your responses.
$5.$ A cat made a purring sound that had a frequency of $35\ Hz.$
Which of the animals mentioned in the table can hear the purring$?$
$A.$ Only human
$B.$ Only elephant
$C.$ Dog and chicken
$D.$ Elephant and human
$6.$ Which of the following sounds can be classiied as noise for humans$?$
$A.$ Sounds that are softer than $20\ dB$
$B.$ Sounds that are in between $20\ dB$ and $40\ dB$
$C.$ Sounds that are between $40\ dB$ and $80\ dB$
$D.$ Sounds that are louder than $80\ dB$
$7.$ Which of these will reduce noise pollution?
Circle ‘Yes’ or ‘No’ to mark your responses.
View full solution →Circle ‘Yes’ or ‘No’ to mark your responses.
| Animal | Frequency range of sound waves |
| Elephant | $15–12000\ Hz$ |
| Human | $20–22000\ Hz$ |
| Dog | $65–45000\ Hz$ |
| Chicken | $125–2000\ Hz$ |
Which of the animals mentioned in the table can hear the purring$?$
$A.$ Only human
$B.$ Only elephant
$C.$ Dog and chicken
$D.$ Elephant and human
$6.$ Which of the following sounds can be classiied as noise for humans$?$
$A.$ Sounds that are softer than $20\ dB$
$B.$ Sounds that are in between $20\ dB$ and $40\ dB$
$C.$ Sounds that are between $40\ dB$ and $80\ dB$
$D.$ Sounds that are louder than $80\ dB$
$7.$ Which of these will reduce noise pollution?
Circle ‘Yes’ or ‘No’ to mark your responses.
| Will this reduce noise pollution? | Yes or No |
| Regulating the use of loudspeakers | Yes/No |
| Setting up more thermal power plants | Yes/No |
| Using more electric vehicles | Yes/No |
Raghav kept a mini sound player in each of two similar containers.
He then tightly covered both the containers with stretched plastic sheets.
He placed some tiny rubber beads on the surface of the sheets.
The picture shows what Raghav noticed when he turned on the sound player.
$3.$ Which of these questions can be answered using the result of Raghav’s activity$?$
$A.$ Does sound travel as waves$?$
$B.$ Does sound produce vibration$?$
$C.$ Does sound travel through vacuum$?$
$D.$ Does sound travel faster in solids than in gases$?$
$4.$ Would the result of Raghav’s activity change if fewer beads had been used$?$ Explain your answer.
View full solution →He then tightly covered both the containers with stretched plastic sheets.
He placed some tiny rubber beads on the surface of the sheets.
The picture shows what Raghav noticed when he turned on the sound player.
$3.$ Which of these questions can be answered using the result of Raghav’s activity$?$
$A.$ Does sound travel as waves$?$
$B.$ Does sound produce vibration$?$
$C.$ Does sound travel through vacuum$?$
$D.$ Does sound travel faster in solids than in gases$?$
$4.$ Would the result of Raghav’s activity change if fewer beads had been used$?$ Explain your answer.
The picture shows four sound waves.
$1.$ Which sound wave has the highest pitch$?$
$2.$ Which of these is true about the four sound waves$?$
Circle ‘Yes’ or ‘No’ to mark your responses.
View full solution →$1.$ Which sound wave has the highest pitch$?$
$2.$ Which of these is true about the four sound waves$?$
Circle ‘Yes’ or ‘No’ to mark your responses.
| Is the statement true$?$ | Yes or No |
| Wave $3$ is the loudest. | Yes/No |
| Wave $1$ and wave $4$ have nearly the same loudness. | Yes/No |
| Wave $2$ and wave $3$ have the same loudness. | Yes/No |
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