Activity 12.1 Class 9 Science Chapter 12
Activity 12.1 Class 9 Science
belongs to Chapter 12 Sound Class 9 Science. You will get a complete
solution with an explanation and conclusion. After reading activity 12.1, you
will be able to answer the questions based on the activity.
Activity 12.1 Class 9
Science Sound
You are suggested to study NCERT activity 12.1 class 9 science
chapter 12 Sound explanation with a conclusion so that you can attempt
questions based on activity 12.1 class 9 science.
Activity 12.1 Class 9 Science
· Take
a tuning fork and set it vibrating by striking its prong on a rubber pad. bring
it near your ear.
· Do
you hear any sound?
· Touch
one of the prongs of the vibrating tuning fork with your finger and share your
experience with your friends.
· Now.
Suspend a table tennis ball or a small plastic ball by a thread from support [Take
a big needle and a thread. Put a knot at one end of the thread and then with
the help of the needle pass the thread through the ball. Touch the ball gently
with the prong of a vibrating tuning fork.]
· Observe
what happens and discuss it with your friends.
 |
| To and fro motion |
Observation and explanation of activity 12.1 Class 9 Science
When the vibrating tuning fork is brought near the ear, we can
hear sound.
when a non-vibrating fork is brought near the ball,
the ball remains in its same position.
When we bring the vibrating tuning fork near the ball,
the ball starts moving to and fro.
Vibration produces sound. Vibration means a kind of
rapid to and fro motion of an object.
Conclusion of activity 12.1 Class 9 Science
This activity shows that the sound is produced by the vibration of any object either by striking, plucking, or scratching.
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