3. Fill in: tube, bones, vibrates, create, outer.
1 The eardrum ... when sound waves hit it.
2 All sound waves first gather in the ... ear.
3 The cochlea is a small curled ... inside the ear.
4 When the nerves in the cochlea move, they ... signals that the brain can understand.
5 The hammer and the anvil are two little ... found inside the ear.

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