Year9Sound

Question 1

Sounds are caused by ..?.. objects

Answer 1

vibrating

Question 2

Sound waves are ..?.. waves

Answer 2

longitudinal

Question 3

All waves including sound waves carry ..?..

Answer 3

energy

Question 4

The part of a sound wave where particles are squeezed closer together than normal is called a …?

Answer 4

compression

Question 5

The part of a sound wave where particles are farther apart than normal is called a …?

Answer 5

rarefaction

Question 6

In a longitudinal wave the direction of particle vibration is ..?.. to the direction of wave travel.

Answer 6

parallel

Question 7

The speed of sound in a liquid is ..?.. than its speed in a gas

Answer 7

higher

Question 8

The speed of sound in a liquid is ..?.. than its speed in a solid

Answer 8

lower

Question 9

The equation to calculate speed

Answer 9

speed = distance travelled / time taken

Question 10

Sound will ..?.. off any hard surface

Answer 10

reflect

Question 11

When sound reflects it causes an …?

Answer 11

echo

Question 12

In an echo situation the distance to the reflecting surface equals

Answer 12

1/2 x echo time x speed of sound

Question 13

Sound cannot travel through a …?

Answer 13

vacuum

Question 14

Sound will travel ..?.. through any material in which the molecules are closer together.

Answer 14

faster

Question 15

Sound can only travel if there are ..?.. to vibrate

Answer 15

particles

Question 16

The speed of sound in air is about …?

Answer 16

330 m/s

Question 17

The speed of ..?.. is about one million times the speed of sound

Answer 17

light

Question 18

Sound waves can be displayed using a microphone connected to an …?

Answer 18

oscilloscope

Question 19

The number of waves created per second or passing a point per second is called the wave …?

Answer 19

frequency

Question 20

Frequency is measured in …?

Answer 20

Hertz (Hz)

Question 21

The distance from one compression or rarefaction to the next one in a sound wave is called the …?

Answer 21

wavelength

Question 22

The unit for wavelength is the …?

Answer 22

metre (m)

Question 23

The maximum distance moved by each vibrating particle in a sound wave is called the ..?.. of the wave.

Answer 23

amplitude

Question 24

The unit for amplitude is the …?

Answer 24

metre (m)

Question 25

On an oscilloscope a wave with a large amplitude will look ...?

Answer 25

tall

Question 26

On an oscilloscope a wave with a large frequency will look ...?

Answer 26

narrow

Question 27

The loudness of a note is controlled by the ..?.. of the sound wave.

Answer 27

amplitude

Question 28

The note caused by a sound wave with a large amplitude will sound ...?

Answer 28

loud

Question 29

The pitch of a note is controlled by the ..?.. of the sound wave.

Answer 29

frequency

Question 30

A high-pitched note is caused by a sound wave with a high...?

Answer 30

frequency

Question 31

A guitar and a trumpet playing the same note sound different because their notes have different ...?

Answer 31

quality

Question 32

The outer part of the ear that funnels the sound waves is called the ...?

Answer 32

Pinna

Question 33

On the way into the ear the sound waves travel along the ...?

Answer 33

ear canal

Question 34

The flap of skin across the end of the ear canal is called the ...?

Answer 34

ear drum

Question 35

Sound waves make the ear drum ...?

Answer 35

vibrate

Question 36

The set of bones behind the ear drum is called the ...?

Answer 36

ossicles

Question 37

When the ear drum vibrates it makes the ossicles ...?

Answer 37

vibrate

Question 38

The ossicles ..?.. the vibrations and pass them on.

Answer 38

amplify

Question 39

The ossicle connected to the eardrum is called the ...?

Answer 39

hammer

Question 40

The ossicle connected to the oval window is called the ...?

Answer 40

stirrup

Question 41

The oval window is in the side of the ...?

Answer 41

Cochlea

Question 42

The ossicles make the ..?.. vibrate

Answer 42

Oval window

Question 43

The area of the oval window is ..?.. than the area of the ear drum

Answer 43

smaller

Question 44

The ..?.. is shaped like a snail's shell

Answer 44

Cochlea

Question 45

The Cochlea is filled with ...?

Answer 45

liquid

Question 46

When the oval window vibrates it causes ..?.. in the liquid in the Cochlea

Answer 46

vibrations

Question 47

The Cochlea is lined with ...?

Answer 47

nerve cells

Question 48

The vibrations in the Cochlear fluid cause the nerve cells to create an electrical ...?

Answer 48

signal

Question 49

The signal from the nerve cells in the Cochlea is sent to the ...?

Answer 49

brain

Question 50

The signals are carried from the Cochlea to the brain along the ...?

Answer 50

auditory nerve

Question 51

The brain interprets the nerve signals from the ear as ...?

Answer 51

sounds

Question 52

A hearing problem that involves a ringing in the ear and that is caused by regular exposure to loud noises is called ...?

Answer 52

Tinnitus

Question 53

Poor hearing caused by old age is due to limited movement of the ...?

Answer 53

ossicles

Question 54

Noise is ..?.. sound.

Answer 54

unwanted

Question 55

A sudden very loud noise can cause a ...?

Answer 55

perforated ear drum

Question 56

Regular exposure to high volume noise can cause ...?

Answer 56

deafness

Question 57

People working in environments where the noise levels are high should wear ...?

Answer 57

ear protectors

Question 58

The loudness of a sound is measured using a ...?

Answer 58

sound-level meter

Question 59

The unit for measuring loudness is the ...?

Answer 59

decibel (dB)