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Lightning
Grade 5
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Sound and Hearing

The ear funnels sound waves into the ear, causing the eardrum to vibrate. Then the hammer, , and stirrup in the middle ear vibrate. Next, a fluid-filled in the inner ear vibrates, stimulating hair cells. These vibrations pass on to the nerve and the brain. Some people wear a hearing to amplify sounds. Deaf people watch close-captioned to understand what is being said. They can using sign language. This contains a(n) to finger spell words.