Book 2 ( Sound)

Question 1

How are sounds made

Answer 1

When an object vibrates

Question 2

What left of a violin vibrates to make a sound

Answer 2

Strings

Question 3

What part of a person vibrates to make a sound

Answer 3

Vocal chords

Question 4

What part of a drum kit vibrates to make a sound

Answer 4

Drum skin

Question 5

Sound is ————— wave

Answer 5

Longitudinal

This means that the direction of vibration is in the same direction as the movement if the wave

Question 6

When do compressions occur

Answer 6

When particles are closest together

Question 7

When do rare factions occur

Answer 7

When particles are furthest apart

Question 8

What does sound travel in

Answer 8

Waves

Question 9

What does sound travel fastest in

Answer 9

Solids

Question 10

What does sound travel slowest in

Answer 10

Gasses

Question 11

Where can sound not travel in

Answer 11

In a vacuum

Question 12

What are all the different parts of the ear

Answer 12

Pinna
Ear canal
Ear drum
Middle ear bones
Semicircular canals
Auditory nerve
Cochlea
Eustachian tube

Question 13

What parts make up the outer ear

Answer 13

Pinna ear canal, ear drum

Question 14

What is the function of the outer ear

Answer 14

To capture the sound waves

Question 15

What are the names of the 3 small bones in the ear

Answer 15

Malleus
Incus
Stapes

Question 16

What is the purpose of the middle ear

Answer 16

To increase the sound vibrations

Question 17

What is the Eustachian tube for

Answer 17

It goes into your mouth
To equalise the pressure in the ear drum

Question 18

Where do the vibrations go behind the oval window

Answer 18

Cochlea

Question 19

What do the fibres in the cochlea do

Answer 19

Turns the vibrations into electric signals in the nerve

Question 20

Why does sound travel fastest in solids

Answer 20

Because it needs particles.
Solid particles are tightly packed and transmit sound quickly