Try this as often as you like. You will get a different set of questions each time you attempt this quiz.
Sound is produced when an object
vibrates
heats up
cools down
changes state
The experiment shown shows that sound can be converted into
kinetic energy
heat energy
light energy
potential energy
When you speak into a phone, which one of the following energy conversions takes place?
Sound to electrical
Sound to light
Sound to kinetic
Electrical to sound
A loudspeaker converts
electrical energy to sound energy
electrical energy to light energy
light energy to sound energy
kinetic energy to sound energy
The speed of sound in air is approximately
340 m/s
300,000,000 m/s
0.001 m/s
1 m/s
Which one of the following statements is correct?
Sound travels faster through water than it does through air
Sound travels fastest through a vacuum
Sound travels faster than light
Sound travels slower through water than it does through air
The diagram shows an apparatus commonly found in science laboratories. This apparatus demonstrates that
sound requires a medium
sound does not travel through air
sound travels fastest when travelling through air
the bell sounds very loud in a vacuum
Sound waves cannot travel through
a vacuum
solids
liquids
gases
Which one of the following creatures finds its way in the dark using a method called echolocation?
Bats
Cats
Snakes
Dolphins
The effect that occurs when an aircraft travels faster than the speed of sound is called
sonic boom
sonic the hedgehog
ultrasonic
supersonic
A boy sees a lightning flash five seconds before he hears its corresponding thunder. How far away is the lightning approximately?
1,700 metres
Immediately above the boy
100 metres
500 metres
The unit of sound level is the
decibel
newton
watt
joule
Brian claps his hands in front of a cliff, and hears the echo 2 seconds later. If the speed of sound is equal to 330 m/s, how far away is the cliff?
330 m
165 m
660 m
600 m
Which one of the following animals uses ultrasound?
Bats
Whales
Cats
Tigers
In which of the following places are you likely to hear the most echoes?
An empty sports hall
A crowded sports hall
A theatre full of people
A small, well furnished living room
The method by which ships determine the ocean depth is called
echo sounding
transmission
oceanography
vacuum sounding
Where is sound most likely to travel at its fastest?
Solids
Liquids
Gases
Vacuum
Which one of the following gives us most protection against noise pollution?
Ear protectors
Lab coat
Cotton wool
Safety spectacles
Ultrasound has many uses. Which one of the following is NOT one of these uses?
Mobile phone masts
Cleaning equipment
Pre-natal scanning
Range finding at sea
An echo is a repeated sound often heard when shouting near a cliff. What causes an echo?
The reflection of sound
The refraction of sound
The dispersion of sound
The breaking up of sound
Sound travels fastest in
steel
vacuum
water
air
On a certain day, the speed of sound in air is 330 m/s. A girl stands in front of a cliff and shouts. She hears her echo six seconds later. Approximately how far away is the cliff?
1 kilometre
2 kilometres
55 metres
25 metres
The table shows some examples of the sound levels given off by various objects. When should ear protection be worn?
Above 85 dB
Above 100 dB
Below 50 dB
Between 60 and 120 dB
Lightning occurs five kilometres away from a village. If the speed of sound is 330 m/s, approximately, how long will it take a person in this village to hear the thunder?
15 seconds
5 seconds
1,650 seconds
Immediately
A newly built classroom has problems with sound echoes. A number of suggestions were made to reduce the echoes occurring. Which one of the following would NOT help reduce the echoes?
Add more glass windows
Put heavy curtains on each window
Carpet the room
Add a foam ceiling
Echo-sounding is used on ships for:
measuring the depth of the seabed
predicting the weather
keeping the ship steady during high seas
preventing seasickness
The speed of sound in water is 1500 m/s. Using echo-location, a ship sends a sound down to the seabed. The sound is reflected and heard eight seconds later. How deep is the water?
6,000 m
600 m
12,000 m
120 m
Another term for “zero decibels” is
the threshold of hearing
sound intensity
ultrasound
sonogram
When astronauts landed on the moon, they could not hear the sound of their craft striking the lunar surface. Why could they not hear this sound?
There is no air on the moon.
Human ears do not work on the moon.
Their space suits were too thick to allow sound in.
They wore ear protection so they would not go deaf with the loud sound made on landing.
In our ear, sound is detected by the _______ which vibrates. These vibrations are picked up by ________ which travels by electrical signals to the_____. What are the missing words (in their correct order)?