Скачать или смотреть What is Sound | Science Project for Kids | Sound Experiments for Kids | Science Experiments

Our life is surrounded by sounds and noises which help us to understand what is going on around us. They are ‘de-coded’. By the brain, even if we can see what has made the noise. Sounds are produced by objects which vibrate. If you place a hand on your throat whilst you are speaking. You will feel the vibration of your vocal chords. But how can sound reach out ears? to understand I will show you sound and vibrations.

To see sound, I have placed cling film on the bowl and rice on it. Now we will take saucepan place near the bowl make sure it will not touch bowl then hit it with a wooden mixing spoon.

The grain of salt is jumping because when the saucepan is hit, it makes a noise which vibrate and produce sound waves.

See vibration, pull back first ball so that string is tightly stretched. Then, let go, so that the ball will touch the next one.

All the ball start moving, the last one in the line swinging as far out as the first because the first ball passes on the movement to the second and so on.

Air molecules which are hit by sound vibrations behave the same way and vibration transmitted from one layer to another and reach to our ear.
#scienceexperiment #kids