2º ESO/WAVES/HEARING 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?  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?

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]]> One hour

]]> One minute

]]> Five minutes

]]> Two hours

]]> Elephants can hear sounds between one and 20,000 hertz. This means they can hear: Elephants can hear sounds between one and 20,000 hertz. This means they can hear:

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]]> Higher sound frequencies than humans

]]> Lower sound frequencies than humans

]]> he same sound frequency range as humans

]]> A smaller sound frequency range than humans

]]> Long or repeated exposure to noise over 85 decibels can cause hearing loss. Which of the following everyday sounds does not exceed this level? Long or repeated exposure to noise over 85 decibels can cause hearing loss. Which of the following everyday sounds does not exceed this level?

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]]> Mp3 player at maximum level

]]> Vacuum cleaner

]]> Electric hand drill

]]> Lawnmower

]]> Some animals bounce sound waves off an object to detect their location, this is known as echolocation. Which of the following animals does not use echolocation?  Some animals bounce sound waves off an object to detect their location, this is known as echolocation. Which of the following animals does use echolocation?

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]]> Dolphins

]]> Whales

]]> Squirrel

]]> Bat

]]> Crocodile

]]> When sound waves reach the ear drum, what happens next? When sound waves reach the ear drum, what happens next?

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]]> The auditory nerve detects the vibration and sends them to the brain

]]> Small bones that sit behind the eardrum amplify the vibration, which is detected by the cochlea in the inner ear

]]> Small hairs in the cochlear detect the vibration from the eardrum and send a message to the brain

]]> Fluid moving in semi-circular canals amplifies the vibration, which is picked up by the auditory nerve and sent to the brain

]]> When your mother tells you to turn down the radio she is asking you to: When your mother tells you to turn down the radio she is asking you to:

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]]> Lower the frequency of the sound wave

]]> Raise the frequency of the sound wave

]]> Raise the amplitude of the sound wave

]]> Lower the amplitude of the sound wave

]]> Which part of the auditory system is the most sensitive to damage from sudden loud sounds? Which part of the auditory system is the most sensitive to damage from sudden loud sounds?

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]]> Hairs in the cochlea

]]> Auditory nerve

]]> Eardrum

]]> Stapes

]]> Why do people using large noisy drills often wear ear muffs? Why do people using large noisy drills often wear ear muffs?

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]]> Because they think they look nice

]]> Because their ears are cold

]]> Because very loud sounds can damage your ears

]]>