Sound Worksheet-1

Sound Worksheet-1

1. When we say 'sound travels in a medium' we mean ______.

(a) The particles of the medium travel

(b) The source travels

(c) The disturbance travels

(d) The medium travels

2. The speed of sound in solid, liquid and gas can be correctly compared as:

(a) solid > liquid > gas                (b) liquid > gas > solid

(c) liquid > solid > gas                (d) gas > liquid > gas

3. A person, pressing his ear on the railway tracks can hear an approaching train. This is possible due to:

(a) vibration of railway tracks

(b) vibration of air

(c) more speed of sound in solid medium

(d) hearing ability of the man

4. A person can be identified by the quality of sound produced by him. The characteristic of a sound can be determined by:

(a) Amplitude                                (b) Frequency

(c) Loudness                                  (d) all of these

5. In humans, the sound is produced by:

(a) Larynx                                      (b) wind pipe

(c) vocal cords                               (d) Lungs

6. The voices of men, women and children are different due to difference in:

(a) Larynx                                      (b) Lungs

(c) vocal cords                               (d) wind pipe

7. An object moving at a speed greater than that of sound is said to be moving at:

(a) Ultrasonic speed                    (b) Sonic speed

(c) Infrasonic speed                     (d) Supersonic speed

8. In which of three media; air, water and steel, does sound travel the fastest?

(a) Air                 (b) Water           (c) Steel              (d) None of these

9. The velocity of sound in vacuum is:

(a) 332 ms^–1      (b) 330 ms^–1     (c) 288 ms^–1     (d) 0

10. Flash and thunder are produced simultaneously. But thunder is heard   a few seconds after the flash is seen. This is because:

(a) speed of sound is greater than speed of light

(b) speed of sound is equal to the speed of light

(c) speed of light is much greater than the speed of sound

(d) none of these

Answer Key:

(1)-(c); (2)-(a); (3)-(c); (4)-(d); (5)-(a); (6)-(c); (7)-(d); (8)-(c); (9)-(d); (10)-(c)