Journey of Sound to the Brain

What catches sound waves and directs them into the ear canal?

• The eardrum

• The cochlea

• The outer ear

• The auditory nerve

Which part of the ear vibrates in response to sound waves?

• The cochlea

• The eardrum

• The ear canal

• The auditory nerve

What shape is the cochlea compared to?

(a)  

• A trumpet

• A snail
• A bone

• A pea

How are sound vibrations converted into electrical signals?

• Through the auditory nerve directly

• Through the vibration of the eardrum

• By the movement of the three tiny bones

• By the ripple of fluid in the cochlea

What determines the pitch of sound that hair cells can detect?

• The location of the hair cells within the cochlea

• The length of the auditory nerve

• The volume of sound

• The size of the hair cells

Which hair cells detect higher pitched sounds?

(a)  

• At the base of the cochlea
• At the apex of the cochlea

• Outside the cochlea

• In the middle of the cochlea

Where are the hair cells that detect the lowest pitched sounds located?

• At the apex of the cochlea

• In the middle of the cochlea

• Outside the cochlea

• At the base of the cochlea

What role does the auditory nerve play in hearing?

• It vibrates in response to sound

• It amplifies sound vibrations

• It carries electrical signals to the brain

• It produces sound waves

Tags

NGSS.MS-LS1-8

How does the brain interpret the electrical signals it receives?

• As visual images

• As tactile sensations

• As smells

• As sounds

Tags

NGSS.MS-LS1-8

The three small bones are found in the

• outer ear

• middle ear

• cochlea

• inner ear