PDF chapter test TRY NOW
Take a tin can. Cut its ends. Stretch a piece of rubber balloon across one end of the can and fasten it with a rubber band. Put four or five grains of dry cereal on the stretched rubber. Now ask your friend to speak “Hurrey, Hurrey” from the open end. Observe what happens to the grain. Why do the grains jump up and down?
The created by the stretched rubber underneath made the grain jump up and down.
Thus, when sound waves impact the eardrum, they cause .
Important!
This is an activity-based exercise. Do the activity and answer questions.
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