Sound

What is sound?

• Waves

• Scientific concept

• Vibrations

• Movement of a drum

Who discovered that sound is carried through air to our ears?

• Thomas Edison

• Plato

• Alexander Graham Bell

• Robert Boyle

What vibrates when we speak?

• Vocal cords

• Throat

• Eardrum

• Tongue

What part of the ear sends signals to the brain?

• hammer and the eustachian tube

• cochlea and the cochlear nerve

• eardrum and middle ear

• external and internal ear

What is the other function of the ears?

• to keep balance

• to touch

• to smell

• to hear

What is the sound level of a normal conversation?

• 150 dB

• 20 dB

• 100 dB

• 60 dB

What device is ued to measure the volume of sounds in decibels?

• Volume button

• Headphones

• Sound level meter

• Iphone

What is a medium?

• the matter that supports the sound travel: solid, liquid, gas

• the environment

• water and air

• material that stops the sound from traveling

What does soundproof mean?

• prevents the passage of sound

• conducts the sound

• improves the sound quality

• carpets, foam, water

What is pitch?

• how high the sound wave goes making the sound loud or silent

• how fast the sound wave travels making the sound high or low

• how a bird produces sound