SCS Year 8 Sound

Sound vibrations are turned into electrical signals.

• True

• False

Sound waves carry __________ from one place to another

• force

• energy

Sound waves are caused by vibrations. Vibrations are ___

• movements that go in a circle

• back and forth movements

The ear does the following job

• Collects sound

• Processes sound

• Sends sound signals to the brain

• All of the above

Which part of the ear takes sound waves and turns them into vibrations?

• Ear canal

• Inner ear

• Eardrum

• Middle ear

Sound waves travel faster in

• water

• air at room temperature

• space

• steel

Large amplitudes of sound vibrations will produce

• loud sound

• quiet sound

• slow sound

• fast sound

The pitch of sound depends upon

• frequency

• amplitude

• both of these

• none of these

The hearing range of the human ear is

• 20Hz to 20,000Hz

• Less than 20Hz

• More than 20,000Hz

• 20Hz to 25,000Hz

A rock concert produces at least 110 decibels of noise. How long do you need to be exposed to this level of noise to begin to get hearing damage?

• One minute

• Five minutes

• One hour

• Two hours