Vacuum.Since space vacuum doesn'thave air,sounds cant travel on it because sounds are just vibrating air.
2.Soundtravels faster in ?than in air.
Solids.Sound travels faster in liquidthan in air since the molecules of liquidare much closer to each other which makes the transmissionof vibrations faster.
3. The speed of the sound depends on the ? of the subtance.
Temperature.Based on NASA:The speed of sound in air depends on the type of gas and the temperature of the gas. On Earth, the atmosphere is composed of mostly diatomic nitrogen and oxygen, and the temperature depends on the altitude in a rather complex way.
4.Sound travels faster in ?than in liquids becausethe molecules are close together.
Solids.Same explanationwith number two and like the sentence mentioned,Solids have moleculeswho are more intactand close to each other.
5.The membrane at the end of the ear canal is the ?.
Eardrum.The eardrum is a membrane that is a tissue-like skin which is stretchedvery tight.It is located at the end of the ear canal before the middle ear.
6.The middle ear is made of three bones called ?,?,and ?.
Hammer,Anvil and Stirrup.These are the three small (smallest in our whole body)bones which built up the middle ear.
7.Inside the inner ear is a fluid-filled structurecontaining tiny hair cells that vibrate,sending impulses to the brain.This fluid-filled structures is alsoknown as ?.
Cochlea.The cochlea is a fluid-filled organ that looks like a snail.It contains the organ for hearing called Corti that consists of tiny hairs that lines the Cochlea.
8.?of the sound determine how far away a sound can be heard.
Intensity.The more the same amount of energy spread iver a greater area,the lessthe intensitygets.
9.?is the human perceptionof sound volumeand dependson intensity.
Loudness.It is the human perceptionof the sound intensityand it is usuallymeasured in decibels.
Answers & Comments
1. Sound waves cannot travel through a ?
2. Sound travels faster in ? than in air.
3. The speed of the sound depends on the ? of the subtance.
4. Sound travels faster in ? than in liquids because the molecules are close together.
5. The membrane at the end of the ear canal is the ?.
6. The middle ear is made of three bones called ?, ?, and ?.
7. Inside the inner ear is a fluid-filled structure containing tiny hair cells that vibrate, sending impulses to the brain. This fluid-filled structures is also known as ?.
8. ? of the sound determine how far away a sound can be heard.
9. ? is the human perception of sound volume and depends on intensity.
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