Sound

Question 1

What is sound caused by?

Answer 1

Vibrations.

Question 2

What do sounds travel in?

Answer 2

Waves.

Question 3

What do sound waves travel through?

Answer 3

A medium.

Question 4

What does a wave transfer?

Answer 4

Energy.

Question 5

What allows sound to travel?

Answer 5

Particles.

Question 6

Particles are not transferred in vibrations?

True or false?

Answer 6

True.

Question 7

How is sound caused ?

Answer 7

Sounds are caused by vibrations of particles which knock each other and pass the vibrations like a Mexican wave.

Question 8

Do they all travel in the same direction?

Answer 8

The vibrations, waves and energy are all moving in the same direction. ( they ate parallel to each other)

Question 9

What of these 2 below are perpendicular to each other?

Energy transfer / wave travel / sound / vibration / particles

Answer 9

Direction of energy transfer is perpendicular to the direction the wave travels.

Question 10

What type of a wave is sound an example of?

Answer 10

Longitudinal

Question 11

The direction of energy transfer is parallel to the direction of particle vibration in a sound wave.
True or false?

Answer 11

True.

Question 12

High frequency =

Low frequency =

Answer 12

High frequency= high pitch

Low frequency = low pitch

Question 13

A high pitch sound has a high ……………= ?

Answer 13

Frequency

Question 14

A high pitch sound will have more (what) per second and a shorter (what).

What 1=???
What 2= ???

Answer 14

What 1= waves

What 2= wavelength

Question 15

What is frequency measured in?

Answer 15

Hertz (hz)

Question 16

What is affected by the speed of vibrations?

Answer 16

Pitch

Question 17

Why is pitch affected by the speed of vibrations?

Answer 17

For example the faster the eardrum vibrates the higher pitch you hear.
And the slower the eardrum vibrates the lower pitch you hear.

Question 18

What is frequency?

Answer 18

Frequency, sometimes referred to as pitch, is the number of times per second that a sound pressure wave repeats itself.

Question 19

What’s amplitude?

Answer 19

Distance between midpoint and top of wave (or bottom/ doesn’t make a difference😅)

Question 20

The bigger the amplitude (what) the volume.

Answer 20

What= louder

Question 21

What’s volume measured in?

Answer 21

Decibels (dB)

Question 22

The volume of a sound is determined by what?

Answer 22

Is determined by the amplitude of the wave.

Question 23

Volume is determined by the what?

Answer 23

By the size/energy of the vibrations

Question 24

What is the distance that particles are displaced by vibrations.

Answer 24

Amplitude

Question 25

Volume is affected by the size of what?

Answer 25

It is affected by the size of amplitude in a wave

Question 26

When sound waves hit a solid object, they bounce off and go in the opposite direction. What is the technical term for this?

Answer 26

Reflection.

Question 27

What piece of equipment allows us to see sound waves as pictures?

Answer 27

Oscilloscope

Question 28

What’s a transverse wave?

Answer 28

In a transverse wave the particles are moving upwards and downwards. Light is an example of transverse waves.

Question 29

Sound needs a material to travel through; ???

Answer 29

???= a solid, liquid, or gas.

Question 30

Sound cannot travel through a vacuum.

Why?

Answer 30

Because there are no particles to vibrate. This means no one can hear u scream in space.

Question 31

Sounds travel fastest in ………… because the particle are close together.

Answer 31

Solids.

Question 32

Travels more slowly in gases because???

Answer 32

Because particles are more far apart.

Question 33

Sound travels more slowly in light because??

Give example.

Answer 33

Because we see lightning before we hear the thunder.

Question 34

If sound travels at 340m/s then in 3 seconds it will travel ………m.

Answer 34

It will travel 1020 m.

Because 340x3=1020. Distance= speed X time

Question 35

What’s a medium

Answer 35

A medium is anything made up of particles; A solid, liquid or gas.