Energy and Sound

Question 1

Name three types of musical instruments and how they produce sound.

Answer 1

Percussion: by hitting, shaking or scraping
String: by plucking or rubbing the strings
Wind: by blowing air through it

Question 2

How do vibrations make music? Give an example

Answer 2

An input of energy like blowing , hitting, or plucking starts the vibrations. The vibrations are very small fast movements. The vibrations move out from the instruments as sound energy. the sounds energy moves through the air to our ear and we hear music.

Example: drum, guitar strings, voice etc

Question 3

True or False:

Sound is a form of energy

Answer 3

True

Question 4

`True or false:

If there is no input of energy, a musical instrument will produce sound on it’s own

Answer 4

False

Question 5

True or False:

All sounds are vibrations

Answer 5

True

Question 6

Describe the process of how sound gets to your ear?

Answer 6

• Sound waves travel through the air
• Your outer ear catches the sound and sends it down your ear canal
• The sound waves make your eardrum vibrate
• The vibrations travel through your middle ear and into your inner ear
• The vibrations hit a nerve which then takes a message about the sound to your brain.
• When your brain hears the message, it hears the sound.

Question 7

Which happens first?

• the sound waves reach the inner ear
• the sound waves vibrate the ear drum

Answer 7

the sound waves vibrate the ear drum

Question 8

give an example of how you would feel a vibration.

Answer 8

Standing next to a railway track

Hand placed directly on a speaker or subwoofer

Question 9

Complete the sentence:

Our ______ hear the vibrations as ________

Answer 9

ears; sound

Question 10

Complete the sentence:

We can ______ vibrations with our bodies

Answer 10

feel

Question 11

_________is a measure of how high or low a sound is

Answer 11

pitch

Question 12

More input of energy makes a sound louder. We say that increases the ______

Answer 12

volume

Question 13

What is noise pollution?

Answer 13

noise pollution is an unwanted sound that carries on for a long time

Question 14

Give an example of noise pollution

Answer 14

humans, tools, machines, cars

Question 15

If you are hearing impaired, you…

Answer 15

have hearing loss

Question 16

How do hearing aids help the hearing impaired?

Answer 16

They help by making the sounds louder

Question 17

Sound always moves______ from the object that is vibrating

Answer 17

outwards or away in all directions

Question 18

True or false:

Working in a noisy environment over a long period of time will not affect your hearing.

Answer 18

False

Question 19

True or false: When humans are underwater they cannot hear the noises that sea creatures make because sound doesn’t travel through water

Answer 19

False

Question 20

Why do you hear sounds more softly is you cover your ears with your hands?

Answer 20

Because the sound has to pass through another material (hand) to get into the outer ear

Question 21

Which of these are correct?
A .Our bodies use energy for only some of the things we do.
B. Our bodies use energy for everything we do.

Answer 21

B: Our bodies use energy for everything we do

Question 22

The ear is made up of three part: Outer ear , middle ear and inner ear. The middle ear consists of 3 tiny bones. What are these?

Answer 22

The hammer, anvil and stirrup

Question 23

When sound waves are gathered and go into your ear canal, they strike the eardrum. What happens next?

Answer 23

The ear drum vibrates and shakes the hammer. The hammer shakes the anvil and then the anvil shakes the stirrup which the passes the vibrations to the cochlea which will eventually pass the sound to the nerve and up to your brain.

Question 24

What is in inside the cochlea?

Answer 24

There is liquid in the cochlea and hair like nerve ends

Question 25

When we talk about sound waves…
A. A low sound makes what kind of waves?
B. A high sound makes what kind of waves?

Answer 25

A. shorter

B. Longer