Sound waves enter the outer ear. They travel down
the ear canal and make the eardrum vibrate. (The eardrum is a thin skin
that stretches across the inner end of the ear canal.) The
vibrations of the eardrum cause vibrations in the three little bones in
the inner ear. These little bones vibrate a spiral-shaped organ
called the "cochlea." The cochlea is filled with liquid
and tiny hairs. Each hair has its own connection with a nerve that
goes to the auditory nerve. Auditory means hearing. The
auditory nerve sends a signal to the brain.
Directions: Answer the questions below about the
ear and how it works.
As sound waves reach the ear they travel down the ear
canal and make the
The eardrum is a thin skin that stretches across
the inner end of the ear
What do sound waves cause the eardrum to do?
What is located inside the cochlea?
liquid and tiny bones
liquid and tiny hairs
bones are located in the inner ear.
The auditory nerve sends messages to the
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