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☆☆☆☆☆there block out Any sound Waves which could damage the ear drum
rjaja's answer:
they are suppose to be worn in the cold weather,and they keep cold wind from blowing into your ear.cold wind that gets into your ears causes an ear infection,and they are painful.if you get a ear infection the following will happen:you can't yawn,(it wil hurt your ears),you will wake up in the middle of the night and your ears will stop hurting,(if it happens,make sure you rub under your ear in circles,).thats what earmuffs prevent.
A corperation
yes
the cargo compartment of a boat, where poorer immigrants traveled in
John D. Rockefeller
A chemical burn. Strong acids and strong bases both cause chemical burns.
delivered mail to homes
Machines
Rubber Boots
Ethic is relating to honour or morality.
To push for temperance.
the cotton gin
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work fast. apex
They became rich by building monopolies
