Sound

Question 1

How is sound created?

Answer 1

Sound is caused by the vibrations of particles that move in a wave-like motion.

Question 2

What kind of waves are sound waves?

Answer 2

Longitudinal waves

Question 3

How do air particles vibrate and move to your ears?

Answer 3

Energy transfers from an object to the air

Question 4

Compression

Answer 4

Air molecules that are compact

Question 5

Rarefaction

Answer 5

Air molecules that are further apart(than compression molecules)

Question 6

Crest

Answer 6

The peak of a wave

Question 7

Trough

Answer 7

The lowest point of a wave

Question 8

Wavelength

Answer 8

The distance between two crests

Question 9

What kind of frequencies and wavelengths do high notes have?

Answer 9

High frequencies and short wave lengths

Question 10

What kind of frequencies and wavelengths do low notes have?

Answer 10

Low frequencies, long wavelengths

Question 11

Frequency

Answer 11

The number of particles pass a point every second

Question 12

How is the frequency calculated?

Answer 12

Wave crest/second

Question 13

Amplitude

Answer 13

The height of a wave

Question 14

What does the amplitude determine?

Answer 14

Whether the sound will be loud or soft

Question 15

What does the amplitude show?

Answer 15

How far particles move within a wave

Question 16

Types of waves

Answer 16

Longitudinal and transverse waves

Question 17

Decibels

Answer 17

They measure the volume of sound

Question 18

How are sound waves formed?

Answer 18

Sound waves are formed by compression and rarefaction particles that move away from a vibrating object

Question 19

Medium

Answer 19

The area that sound (and light)travels through like gas

Question 20

What don’t sound waves travel through?

Answer 20

Vaccums

Question 21

What direction do transverse waves move?

Answer 21

Transverse waves move perpendicular so up and down

Question 22

What direction do longitudinal waves move?

Answer 22

Parallel so back and fourth like a spring

Question 23

Pitch

Answer 23

How low or high a sound is which is determined by frequency

Question 24

Functions of the outer ear

Answer 24

Collects sound waves

Question 25

Parts of the outer ear

Answer 25

Pinna and ear canal

Question 26

The function of the middle ear

Answer 26

Amplifies the sound

Question 27

Parts of the middle ear

Answer 27

Oval window, eustachian tube and the ossicle bones(hammer, anvil, stirrup)

Question 28

The function of the inner ear

Answer 28

Converts sound into nerve messages for the brain

Question 29

Parts of inner ear

Answer 29

Cochlea, Eardrum

Question 30

What volume and above in decibels can damage your ears?

Answer 30

90dB+

Question 31

Auditory nerve

Answer 31

Transports sound from the receptor cells to the brain

Question 32

Eustachian tube

Answer 32

Balances air pressure

Question 33

The ossicle bones:

Answer 33

Magnify vibrations from sound waves(or amplify the sound, same thing)

Question 34

Ear canal:

Answer 34

Moves sound waves from the pinna to the eardrum

Question 35

Pinna:

Answer 35

Collects sound waves

Question 36

Eardrum:

Answer 36

Vibrates when sound hits it and moves sound waves to the ossicle bones

Question 37

Semicircular canals:

Answer 37

Helps us maintain our balance

Question 38

Oval window:

Answer 38

Activates receptors and allows fluid in the cochlea to move

Question 39

Cochlea;

Answer 39

Converts sound waves into electrical signals(or nerve messages) for the brain

Question 40

Speed of sound

Answer 40

340km/hr

Question 41

What doesn't sound waves travel through?

Answer 41

Vaccums

Question 42

Does sound travel faster through solids or liquids?

Answer 42

Solids

Question 43

Human hearing range

Answer 43

20Hz to 20,000 Hz

Question 44

Speed of sound in air

Answer 44

343m/s

Question 45

Why can't sound travel through a vacuum like space

Answer 45

Space has particles that are too apart for sound waves to form

Question 46

How do concave lens treat myopia

Answer 46

Myopia is corrected with concave lens because they cause light rays to diverge which allows the eye to focus on objects further away

Question 47

How do convex lens treat hyperopia

Answer 47

Hyperopia is corrected with the convex lens as they cause light rays to converge so that the eye can focus on objects that are near.

Question 48

How does do we hear(pathway of sound)

Answer 48

Pinna collects the sound waves and the sound waves travel through the ear canal to the eardrum. The eardrum vibrates when the sound hits it and sends the vibrations to the ossicle bones. The ossicle bones amplify the sound waves and transfer them to the cochlea. The cochlea converts the sound waves into electrical signals which are carried to the brain by the auditory nerve. The brain then interprets the sound.

Question 48

How does do we hear(pathway of sound)

Answer 48

Pinna collects the sound waves and the sound waves travel through the ear canal to the ear drum. The ear drum vibrates when the sound hits it and sends the vibrations to the ossicle bones. The ossicle bones amplify the sound waves and transfer it to the cochlea.The cochlea converts the sound i

Question 49

Refractive index of s substance

Answer 49

The amount of light that bends when it passes through an object