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CBSE Class 3 EVS Worksheet

Sound

1.
State True or False: Sound does not travel through light.
A) true B) false
2.
Fill in the blanks: Ear has _____ internal parts through which sound travels.
A) One B) Two C) Three D) Four
3.
State True or False: The speed of sound is 70 miles per hour in air.
A) true B) false
4.
State True or False: Sound is the threshold of hearing.
A) true B) false
5.
What is the speed of sound?
6.
What is an oscilloscope?
7.
What does greater frequency cause?
8.
State True or False: The energy we can hear is sound energy.
A) true B) false
9.
Where does alternating current come from?
10.
Fill in the blanks: Sound does not travel through_______.
A) Air B) Nitrogen C) Vaccum D) Gel
11.
State True or False: Walking uses sound.
A) true B) false
12.
What is sound energy?
13.
What is frequency?
14.
Fill in the blanks: The easiest way to change the pitch of a string is to change its _____.
A) Sound B) Length C) Surface D) Dimensions
15.
Fill in the blanks: The speed of sound is slower than the speed of ________.
A) Car B) Light C) Train D) Bus
16.
Fill in the blanks: Sound reaches into_____ of the body.
A) Eyes B) Tongue C) Skin D) Wars
17.
What is music?
18.
What is intensity?
19.
Write the uses of sound.
20.
Fill in the blanks: Sound travels better through ___________ than air.
A) Water B) Nitrogen C) Solid D) Plasma

CBSE Class 3 EVS Worksheet

Sound

Answers

1.
Option B
2.
Option C
3.
Option B
4.
Option B

5.
The speed of sound is 770 miles per hour in air.
6.
An oscilloscope is an electronic measuring instrument used to display constantly varying
signals.
7.
Greater frequency causes higher pitch.
8.
Option A

9.
Alternating current comes from a wall socket.
10.
Option C
11.
Option B

12.
Sound energy is the energy produced by vibrating sound waves.
13.
Frequency is the number of cycles or completed alternations per unit time of a wave or
oscillation.
14.
Option B
15.
Option B
16.
Option D

17.
Music is a sound that has rhythm, pitch and volume.
18.
Intensity determines the loudness.
19.
We inform each other on time with the lunch whistle, danger with the fire alarm or the police whistle, happiness or sadness with music, and so on.
20.
Option C

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