Why do I Hear Sounds?

WALT use the correct writing structure for sound.
I know I have learnt this when I can give examples of why do we hear sounds.

Sound waves are vibrations that travel through the air and can be heard when it reaches a person or animal's ear. Sound waves are also collected by the outer air which can can cause the eardrum to vibrate.

Sound waves are in the medium air. . The human eardrum passes the vibrations through the middle ear bone. The three bones in the human air are called the hammer, anvil and stirrups. The stirrup is known as the smallest bone in your ear.

There is also a bone called stereocilia in your ear. Sound makes the stereocilia rock backwards and forwards. If the sound is too loud, the stereocilia can easily bend and break. If it breaks, it would be damaged and we would not be able to repair it.  

Hearing sounds is important because when we walk near busy roads we are aware of the sounds around us and so we can be careful of our surroundings . Also when we are in danger we can be alert and seek for help if we need too.