As sound enters the ear, it vibrates the at the boundary between the outer ear and middle ear, causing the sound waves to then vibrate the hammer.

Use the image to identify how vibrations travel through the different ear structures.

First, a sound waves enters the  

✔ ear canal

in the outer ear.

Then, the sound wave vibrates the  

✔ eardrum

, which connects to the hammer.

The first of the tiny bones in the middle ear is the hammer, which vibrates the  

✔ anvil

The last of the tiny bones in the middle ear strikes the  

✔ cochlea

, which is found in the inner ear.

Explanation:

It is correct in edunity

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hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds