SOUND MCQ ICSE CLASS 8

SOUND FILL IN THE BLANKS AND NOTES

SOUND TRUE AND FALSE

Tick (✔) The correct choice amongest the following

1. Sound is a form of : (a) energy(b) wave(c) disturbance(d) all of these

2. Sound travels fastest in : (a) solids(b) liquids(c) gases(d) vacuum

3. The loudness of a sound (a) amplitude(b) pitch(c) velocity(d) wavelength

4. Loudness is a sensation depending upon : (a) time period(b) phase(c) frequency(d) intensity

5. Hertz is a unit of : (a) time period(b) wavelength(c) frequency(d) wave speed

Answers

Tick (✔) The correct choice amongest the following

1. (a) energy

2. (a) solids

3. (a) amplitude

4. (a) time period

5. (c) frequency

WORKSHEET

Select the correct alternative

(a) Sound can not travel in

1.  solid

2.  liquid

3.  gas

4.  vacuum

(b) When sound travels in form of a wave

1. the particles of medium move from the source to the listener

2.  the particles of medium remains stationary

3.  the particles of medium start vibrating up and down

4.  the particles of medium transfer energy without leaving their mean positions.

(c) The safe limit of loudness of audible sound is

1.  0 to 80 dB

2.  above 80 dB

3.  120 dB

4.  above 120 dB

(d) The unit of loudness is

1.  cm

2.  second

3.  hertz

4.  decibel

(e) In a piano, pitch is decreased by

1.  using thicker string

2.  increasing tension

3.  reducing length of string

4.  striking it hard
   

1. Loudness of a sound depends on the a. the wavelength of sound. b. volume of air around the vibrating body. c. time. d. none of these Answer:d. none of these

2.The pitch of a sound increases with increase in its a. frequency. b. loudness. c. amplitude. d. time period. Answer:a. frequency.

3.The pitch of a flute can be increased by

a. increasing the length of its vibrating air column.

b. decreasing the length of its vibrating air column.

c. increasing the length of its vibrating string.

d. decreasing the length of its vibrating string.

Answer:

b. decreasing the length of its vibrating air column.

4.A sound produced by guitar and violin with the same pitch and loudness is distinguished by its

a. frequency.

b. amplitude.

c. timbre.

d. time period.

answer:

c. timbre.

5.Which of the following properties of sound is responsible for its loudness?

a. frequency

b. pitch

c. amplitude

d. quality

Answer:

c. amplitude

6.Musical sounds are caused due to –

a. regular vibrations.

b. irregular vibrations.

c. damped vibrations.

d. none of these

Answer:

a. regular vibrations.

7.The sound that never changes in pitch, volume, speed or timbre is known as –

a. monologue.

b. monolingual.

c. monophony.

d. monotone.

Answer:

d. monotone.

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