Sound Worksheet for Grade 7 with Solved
Sound Worksheet for Grade 7: Sound Worksheet for Grade 7 students with solution in this page. Students of Standard 7 who are already cleared concept on Sound can solve this paper.
Sound
Q1) What is vibration?
Ans. To and fro movement is known as vibration.
Q2) How vocal cords produce sound?
Ans. when there is a vibrations in vocal cord it produce sound.
Q3) Name the instrument that produce sound?
Ans. Drum, guitar, flute and tabla
Q4) Name three instrument that produce sound by vibrating string?
Ans. Guitar, violin and sitar.
Q5) Name the instrument that produce sound vibrating membranes?
Ans. Drum tabla and dhol produce sound vibrating membranes.
Q6) Name the instrument produce sounds by vibrating in air?
Ans. Flute, saxophone
Propagation of sound
Q1) When ringing bell is heard?
Ans. when the bell jar is filled with air.
Q2) When can the tick tock sound of a clock be heard?
The tick sound of the clock can be heard through the table more clearly than through the air.
Q3) What is stethoscope
Ans. It is used by physician to diagnose patients in order to listen their heart, pulses and lungs in such away that it’s membrane vibrates according the sound emitted by them.
Q4) How sound pipes are used?
Ans. sound pipes are used to propagate sound to far way places, it is used by large buildings, ships and graphite mines.
Q5) Where we can clearly heard the sound of dolphin?
Ans. we can clearly heard the sound of dolphin when we are in under water.
Q6) What is the speed of sound according to medium?
Ans. Air – 330
Water- 1500
Steel- 4500