8L Sound

Question 1

What is the intensity of sound

Answer 1

Whether it is loud or soft

Question 2

What is the pitch ,of the sound

Answer 2

Whether it is high or low

Question 3

How are sounds made

Answer 3

By vibrating objects which produce sound waves

Question 4

How do scientists detect animal sounds

Answer 4

A microphone which is attached to a oscilloscope

Question 5

What is the amplitude

Answer 5

The height of a sound wave

Question 6

What is one cycle

Answer 6

One complete wave (up and down )

Question 7

What is the wavelength

Answer 7

The distance between the same points on two cycles is called the wavelength

Question 8

A large amplitude gives a

A small amplitude gives a

Answer 8

Loud noise

Quiet noise

Question 9

A long wavelength means

Answer 9

The frequency is lower and the pitch is lower

Question 10

A short wavelength means

Answer 10

The frequency is higher and so is the pitch

Question 11

What is the frequency and what is it measured in

Answer 11

The number of complete waves passing a point each second

Measured in hertz (Hz)

Question 12

What is the range of frequency for the human ear

Answer 12

20Hz-20 000Hz

Question 13

What do Sound waves do

Answer 13

Transfer energy

Question 14

How do sound waves travel

Answer 14

Through a medium in longitudinal waves

Question 15

Sound waves travel fastest through solids because

Answer 15

The particles are close together which means when they vibrate they will bump into each other more and pass on energy

Question 16

Can sound waves travel through a vacuum.

Answer 16

No as there are no particles

Question 17

How do we hear

Answer 17

Sound waves travel through the air and into the auditory canal after the pinnacle directs it , making the eardrum vibrate . This then causes ossicles ( three small bones called the hammer anvil and stirrup ) in the ear to vibrate which causes the liquid inside the cochlea go vibrate , this changes sound waves to signals called impulses which travel to the brain . When it reaches the brain we hear it

Question 18

What is the cochlea

Answer 18

A spiral structure in the inner ear

Question 19

What can the human ear be divided into

Answer 19

The inner outer and middle ear

Question 20

What is in the outer ear

Answer 20

The pinnacle which doeprects sound down the auditory canal to the ear drum

Question 21

How can the ear get damaged two ways

Answer 21

Loud noises , too high headphones damage the cochlea . No cure
Ear infection which can be treated by antibiotics

Question 22

As people get olde why do they hear less usually

Answer 22

The hammer anvil and stirrup May fuse together so don’t vibrate
Nerve cells in the cochlea don’t work as well

Question 23

How I s an echo caused

Answer 23

When a sound wave is reflected . It bounces of the object

Question 24

How can we measure sound

Answer 24

Using a sound intensity meter units are decibals (dB)