Page 72 - Science Class 6 Times Publication

Exercise

1. Choose the best alternative in each case:
a. Sound is produced due to

i. Frequency ii. Amplitude
iii. Vibration iv. Oscillation

b. The region where the molecules of medium are tightly packed is
called
i. Rarefaction ii. Compression
iii. Crest iv. Trough

c. Sound cannot travel through
i. Solid ii. Liquid

iii. Gas iv. Vacuum
d. A sharp sound has

i. High pitch ii. Low pitch
iii. High speed iv. Low energy
2. Copy the correct statements and correct the wrong statements:

a. Sound is produced by the vibration of an object.
b. Sound produces sensation of vision.
c. Sharp sound has more pitch.

d. Larger objects produce sharp sound.
e. Sound travels through vacuum.
f. Traveling or movement of sound from one place to another is
called propagation of sound.

3. Answer these questions in very short:
a. What is sound? How is it produced?

b. Mention any four sources of sound.
c. What is sound wave?

d. What is propagation of sound?
e. Can sound propagate in vacuum?

Times' Crucial Science and Environment 68 Book 6