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Grade 8 CBSE
› Sound Worksheet-4
How is sound produced?
Do all bodies can produce sound?
What do you feel when you touch a sound producing school bell?
Touch the bell when it stops producing sound. Can you feel the vibrations?
The bell which is not producing sound doesn’t vibrate. What do you understand by this?
What do you understand by vibrations?
In some cases we cannot see vibrations explain why is it so?
What is amplitude?
Name a musical instrument which produces sound by air column.
Name the sound producing organ in human.
What is the other name of larynx?
What are vocal cords?
Do all animals produce sound by vocal cords?
On which quality of sound or voice depend?
Do the length of vocal cords is same in men and women?
What is the length of vocal cords in men and women?
How does sound travel from one place to another?
Can sound travel through vacuum?
What types of medium is required to travel sound?
How do whales and dolphins hear the sound?
Sound is produced by vibrating bodies.
Vibrations in the bell.
Only vibrating bodies can produce sound.
The back and forth motion of an object is called vibration.
When amplitude of vibrations is very small, then we cannot see them.
The maximum displacement of a vibrating body on one side is called amplitude.
The cords stretched across the voice box or larynx is called vocal cords.
The quality of sound or voice depends on the looseness or tightness of vocal cords.
The length of vocal cords in men and women is 20 mm and 15 mm respectively.
Sounds travels through a material medium from one place to another.
No, sound cannot travel through vacuum.
The medium may be solid, liquids and gases.
Whales and dolphins live in water. They hear sound through water.
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