1. The Ear & Sense of Hearing Notes

2. 1. Hearing _______ is produced when something _________. Sound
_________ is the _______ that lets us experience _______.
Sound
vibrates
Hearing
sense
sound

3. middle A. Structure of the Ear:
3 main sections: outer, ________ and inner ear.
Outer ear: external ear and ____ _______
middle
ear
canal

4. eardrum outer middle thin Middle ear: __________ and three tiny bones
Eardrum separates ______ ear from the ________ ear.
Eardrum: _____ flexible ____________ that _________ when sound waves hit it.
eardrum
outer
middle
thin
membrane
vibrates
Hammer
Anvil
Stirrup

5. Three tiny bones called the _________, the ______ and the ________.
hammer
anvil
stirrup

6. nerve Inner ear: cochlea & ________________ Cochlea sound impulses
_________ is a fluid-filled structure shaped like a snail shell. It is what translates _______ vibrations into _______ __________ so the brain can understand sounds.
auditory
nerve
Cochlea
sound
nerve
impulses

7. Auditory nerve ________ the nerve __________ from the cochlea to the ______.
carries
impulses
brain

8. Label the structures of the ear.
semicircular canals
stirrup
auditory nerve
anvil
hammer
external ear
cochlea
eardrum
eustachian tube
ear canal

9. B. How Sense of Hearing Works:
______________ traps sound waves and funnels them down the ___________ to the middle ear.
External ear
ear canal

10. Sound waves cause the __________ to vibrate.
The eardrum vibrates the hammer, ______, and stirrup.
eardrum
anvil

11. The stirrup vibrates _____ in the _________, which stimulates _______ endings.
fluid
cochlea
nerve

12. Nerve endings send __________ by the auditory nerve to the ______ for interpretation as sound.
impulses
brain

13. how we hear sounds
CLICK HERE to see an animation of the ear

14. Click here to see a video on how we hear sounds.