ST. LAWRENCE HIGH SCHOOL
A JESUIT CHRISTIAN MINORITY INSTITUTION
27,BALLYGUNGE CIRCULAR ROAD,KOLKATA -700019
ANSWER: WORKSHEET- 25
2nd Term
Class: 3 Subject: SCIENCE Date:20.06.2020
SOUND
1. Name the following.
a. The structure at the top of the wind pipe that contains the vocal cords. Voice box
b. Language in which people communicate through signs and gestures. Sign
language
c. An unpleasant or loud sound that hurts our ears. Noise
d. The oldest musical instrument used by human beings. Flute
e. Soft and pleasing sounds. Pleasant sound
f. The sound produced by the tiger. Roar
2. Classify the following sounds as pleasant and unpleasant sound.
PLEASANT SOUNDS UNPLEASANT SOUNDS
a. Chirping of the birds Hammering a nail
b. Sound of the river flowing Honking of a vehicle
c. Music played on the guitar Sound at construction sites
d. Songs Baby crying
3. State whether True or False.
a. We can see sound, but cannot hear it. False
b. Nature also makes sounds. True
c. We make sound with our voice box. True
d. Languages are made up of different sounds. True
e. We do not make any sound when we sneeze or cough. False
f. Loud sounds are good for our health. False
g. The voice box vibrates when we speak or sing. True
h. Loud sound is called noise. True
i. Sounds made with musical instruments are disturbing. False
j. The sheep bleats. True
Ms. Susmita Subarno
Chirping of the birds, hammering a nail, honking of a vehicle, sound of the river
flowing, music played on the guitar, sound at construction sites, Baby crying, Songs