Sound Waves and Human Hearing Quiz

What are sound waves?

• Light waves that travel through solids

• Particles that travel through the air

• Vibrations that pass through the molecules of a medium

• Electrical signals that travel through liquids

What are compressions in a sound wave?

• Regions where the vibrating particles are closest together

• Regions where the particles are furthest apart

• Regions where the particles are all bunched up

• Regions where the particles are all spread out

In which type of wave do sound waves travel?

• Transverse wave

• Longitudinal wave

• Electromagnetic wave

• Mechanical wave

Why does sound travel faster in solids than in liquids?

• Because solids have less particles

• Because solids have denser particles

• Because solids have lighter particles

• Because solids have more particles

Why can't sound travel through a vacuum?

• Because there are no particles for the sound to vibrate through

• Because the wavelength of the sound is too short

• Because the frequency of the sound is too high

• Because the speed of sound is too slow

What happens to the wavelength as sound speeds up in higher density mediums like solids?

• It becomes invisible

• It gets longer

• It remains the same

• It gets shorter

What gives us echoes when sound is reflected?

• Hard flat surfaces

• Gaseous surfaces

• Soft curved surfaces

• Liquid surfaces

What part of the ear converts sound vibrations into electrical signals?

• Eardrum

• Ear canal

• Semicircular canals

• Cochlea

What determines which frequencies we can hear?

• Size and shape of all ear structures

• Size and shape of the cochlea

• Size and shape of the eardrum

• Size and shape of the ear canal

What is the normal range of frequencies that humans can hear?

• 10 Hz to 15,000 Hz

• 20 Hz to 20,000 Hz

• 25 Hz to 25,000 Hz

• 30 Hz to 30,000 Hz