Question

Science

A sound wave ________ and ______ the air molecules around your ear.
1 moves and shakes
2 vibrates and heats up
3 compresses, expands

Answer 1

A sound wave compresses and expands the air molecules around the ear, causing the eardrum to vibrate and allowing us to hear sounds.

Step-by-step explanation:

A sound wave compresses and expands the air molecules around your ear. When a sound wave travels through the air, it does so by creating regions of high pressure (compressions) and low pressure (rarefactions). As described in Figure 17.6, these compressions and rarefactions travel up the ear canal and cause the eardrum to vibrate. There is a net force on the eardrum since the sound wave pressures are different from the atmospheric pressure found behind the eardrum. This force is what allows the eardrum to pick up on the sound wave, converting the vibrations into nerve impulses that our brain can interpret as sound.

Answer 2

2, it vibrates and heats up the molecules around your ear.