ear parts

the ( ----- )collects sound in the environment

• ear drum

• pinna

• cochlea

• hummer

the ( ----- ) separates the outer ear from the middle ear. it vibrates when it is hit by sound .

• ear drum

• ear canal

• cochlea

• anvil

the ( ----- ) detects the vibrations and changes them into messages .

• ear canal

• ear drum

• pinna

• cochlea

the ( ----- ) directs sound to the middle ear .

• ear drum

• pinna

• ear canal

• hammer

sound is ?

• transvers wave

• longitudinal wave

sound can not travel in space because ?

• there is no matter

• there is matter

• the space is vacuum

• all above

Sound waves can travel through ?

• solids, liquids, gases

• solids, liquids

• solids, gases

• liquids, gases

sound wave can travel in one directions away from their source .

• true

• false

When the vibrations are fast you hear a

high pitch.

• true

• false

in which medium the sound speed is more ?

• water

• air

• iron

• diamond