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Vibrations

Causation: How sounds are experienced.

Drumming to watch sound waves travel
 and move pebbles on a bowl.
This week we conducted a number of experiments to help the children understand that sound is made when something vibrates and causes sound waves to travel. We started by placing our hands on the side of our throats and made different sounds. The children were able to feel the different vibrations when they talked, hummed and whispered. The children began to understand that when they stopped making sound, the vibration on their throats stopped.
Using a rule to create sound.
Strumming an elastic.
Using the telephone.
After conducting experiments, the children had a better understanding that when vibrations stop so does the sound. We concluded by making telephones.  There was lots of giggling as the children talked to one another using their phones. The children were amazed that the sound (vibrations) could travel from one end of the cup to the other.

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