Sound Energy II - JSS3 Basic science Past Questions and Answers - page 1
What happens when sound waves encounter a surface?
They bounce off and change direction
They disappear completely
They pass through the surface unchanged
They become louder
Which part of the ear vibrates when sound waves enter?
Eustachian tube
Tympanic membrane (eardrum)
Cochlea
Auditory nerve
What organ in the inner ear is responsible for converting sound vibrations into electrical signals?
Tympanic membrane
Auditory nerve
Cochlea
Eustachian tube
How are sound vibrations transmitted from the middle ear to the inner ear?
Through the eardrum
Through the auditory nerve
Through the cochlea
Through tiny bones in the middle ear
What do hair cells in the cochlea do?
Convert sound vibrations into electrical signals
Transmit sound waves to the brain
Protect the inner ear from damage
Help maintain balance
What role does the auditory nerve play in hearing?
It detects sound vibrations
It interprets electrical signals from the cochlea
It amplifies sound waves
It regulates fluid in the inner ear
Why is understanding sound reflection important?
To make sound disappear completely
To create optimal acoustics in various environments
To increase the volume of sound waves
To prevent sound from reaching the ears
How do sound waves travel through the ear canal?
Through the cochlea
By bouncing off the eardrum
By vibrating the eardrum
Through the auditory nerve
What is the primary function of the eardrum?
To convert sound vibrations into electrical signals
To amplify sound waves
To protect the inner ear
To vibrate in response to sound waves
What happens to sound waves when they strike a surface?
They disappear completely
They reflect and change direction
They pass through the surface unchanged
They become softer