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HIA International — Grade 8

Unit 1: Photosynthesis and the carbon cycle

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Unit 2: Properties of materials

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Unit 3: Forces and energy

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Unit 4: Maintaining life

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Unit 5: Reactivity

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Unit 6: Sound and space

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Unit 7: Genes and inheritance

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Unit 8: Rates of reaction

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Unit 9: Electricity

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Quiz

Reflections of sound – Quiz

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Reflections of sound HIA Science quiz set 2: free practice for HIA International. Work through this Reflections of sound HIA Science quiz set 2 and get instant feedback on every answer. If you get stuck, review the 24.2 Reflections of sound – Notes lesson. More practice: HIA International — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: A-
  • Time limit:
Start Quiz
1.
Which statement correctly describes reflected?
energy transferred by vibrations through a medium
a reflected sound heard after the original
not useful or intended
sent back from a surface
2.
Which statement correctly describes acoustics?
about 330 to 340 metres per second
the prolonging of sound by many reflections in an enclosed space
the study of how sound behaves in a space such as a concert hall
the medical use of reflected high-frequency sound to make images
3.
Which statement correctly describes echo sounding?
the prolonging of sound by many reflections in an enclosed space
the medical use of reflected high-frequency sound to make images
using the time for an echo to return to calculate a distance
about 330 to 340 metres per second
4.
A student claps 85 m from a cliff and hears the echo. Taking the speed of sound as 340 m/s, how long after the clap is the echo heard?
0.25 s
4 s
1 s
0.5 s
5.
Rosa bangs two blocks of wood together once while standing at the distance from a cliff shown in the diagram. How long after the bang does she hear the echo?
Dr Dabour Hub Academy - figure 1
0.75 seconds
1.5 seconds
1.33 seconds
3.0 seconds
6.
Which statement correctly describes absorption of sound?
about 330 to 340 metres per second
the taking in of sound energy by soft or porous materials
using the time for an echo to return to calculate a distance
the study of how sound behaves in a space such as a concert hall
7.
The school drama studio has a bad echo. Musa says covering the back wall with glazed tiles will fix it, because tiles are waterproof and easy to clean. Use the table to evaluate his idea.
Agree – hard, waterproof tiles absorb sound better than soft materials
Agree – any flat covering on the wall will stop an echo forming
Disagree – tiles reflect most sound, so foam panels would cut echoes most
Disagree – carpet tiles would reflect even more sound than glazed tiles
8.
Which statement correctly describes reverberation?
the prolonging of sound by many reflections in an enclosed space
the study of how sound behaves in a space such as a concert hall
about 330 to 340 metres per second
using the time for an echo to return to calculate a distance
9.
Which statement correctly describes ultrasound scanning?
the study of how sound behaves in a space such as a concert hall
about 330 to 340 metres per second
a reflected sound heard after the original
the medical use of reflected high-frequency sound to make images
10.
A ship sends a sonar pulse and receives the echo from the seabed 2 s later. Sound travels at 1500 m/s in water. How deep is the sea?
3000 m
1500 m
6000 m
750 m
11.
Zara and Omar clapped in front of a large brick wall and timed how long the echo took to come back. Using their table, what is the best estimate of the speed of sound in air?
About 170 m/s
About 340 m/s
About 680 m/s
About 34 m/s
12.
An empty sports hall gives a loud echo when someone shouts. During a match, with 300 people inside, the echo is hardly heard. Which is the best explanation?
The people make the air thicker so sound cannot reach the walls
Sound only reflects from walls when there is nobody in the way
Clothes and bodies are soft, so they absorb much of the sound
The walls stop being hard surfaces when the hall becomes warm
13.
Which statement correctly describes speed of sound in air?
the study of how sound behaves in a space such as a concert hall
about 330 to 340 metres per second
the prolonging of sound by many reflections in an enclosed space
using the time for an echo to return to calculate a distance
14.
Match the term to its correct meaning: ultrasound scanning
the study of how sound behaves in a space such as a concert hall
a reflected sound heard after the original
the medical use of reflected high-frequency sound to make images
using the time for an echo to return to calculate a distance
15.
Match the term to its correct meaning: speed of sound in air
the prolonging of sound by many reflections in an enclosed space
about 330 to 340 metres per second
the medical use of reflected high-frequency sound to make images
a reflected sound heard after the original
16.
Match the term to its correct meaning: reverberation
a reflected sound heard after the original
the medical use of reflected high-frequency sound to make images
about 330 to 340 metres per second
the prolonging of sound by many reflections in an enclosed space
17.
Which term is described as: the taking in of sound energy by soft or porous materials?
echo sounding
echo
absorption of sound
acoustics
18.
Which term is described as: a reflected sound heard after the original?
echo
speed of sound in air
echo sounding
acoustics
19.
Which term is described as: sent back from a surface?
sound
unwanted
reflected
echo
20.
Match the term to its correct meaning: acoustics
the taking in of sound energy by soft or porous materials
the study of how sound behaves in a space such as a concert hall
using the time for an echo to return to calculate a distance
the prolonging of sound by many reflections in an enclosed space
21.
Which term is described as: the study of how sound behaves in a space such as a concert hall?
echo sounding
acoustics
absorption of sound
echo
22.
Which term is described as: the prolonging of sound by many reflections in an enclosed space?
acoustics
absorption of sound
reverberation
ultrasound scanning
23.
Match the term to its correct meaning: echo
a reflected sound heard after the original
the prolonging of sound by many reflections in an enclosed space
the taking in of sound energy by soft or porous materials
about 330 to 340 metres per second
24.
In echo sounding the distance must be _____ because the sound travels there and back.
doubled
ignored
halved
squared
25.
The study of how sound behaves in a space is _____.
dynamics
optics
acoustics
mechanics
26.
A ship finds how deep the sea is by timing echoes from the seabed. This method is called _____.
soundproofing
lateral inversion
sonar ranging
diffuse reflection
27.
Medical images made with high-frequency sound use _____.
infrasound
radio waves
X-rays
ultrasound
28.
Soft porous materials _____ sound.
speed up
reflect
absorb
produce
29.
Prolonged sound from many reflections is _____.
absorption
diffraction
refraction
reverberation
30.
The speed of sound in air is about _____ m/s.
3300
3
33
330
31.
Ultrasound scanning is avoided because it is more dangerous than X-rays. - True or false?
True
False
32.
An echo must arrive after enough delay for the ear to hear it separately. - True or false?
True
False
33.
In echo sounding the sound travels to the object and back, so the distance must be halved. - True or false?
True
False
34.
Ultrasound reflects differently from different tissues, which is how an image is built. - True or false?
True
False
35.
The speed of sound in air is about 3 metres per second. - True or false?
True
False
36.
Sonar is used to map the sea floor. - True or false?
True
False
37.
Ultrasound passes straight through all tissue without reflecting. - True or false?
True
False
38.
Echo sounding uses the time for an echo to return to calculate a distance. - True or false?
True
False
39.
Theatres use heavy curtains and carpets so that actors' voices echo more and reach the back of the room. True or false?
True – the statement is correct
True, as soft surfaces reflect sound best
True, but only when the theatre is empty
False – they absorb sound to cut echoes
40.
Reverberation is caused by many reflections in an enclosed space. - True or false?
True
False
41.
The loudest echoes come from soft, uneven surfaces such as foam panels. True or false?
False – soft surfaces absorb sound
True – the statement is correct
True, but only in a recording studio
True, because foam has many surfaces
42.
The speed of sound in air is about 330 metres per second. - True or false?
True
False
43.
Ultrasound scanning is used because it does not harm body tissue. - True or false?
True
False
44.
Sonar cannot be used underwater. - True or false?
True
False
45.
Reverberation is caused by sound being absorbed completely. - True or false?
True
False
46.
In echo sounding the distance is simply speed multiplied by the whole time. - True or false?
True
False
47.
A ship's sonar gets a longer echo time where the sea is shallower. True or false?
True – the statement is correct
True, because shallow water slows sound
False – longer time means deeper water
True, but only over a rocky seabed
48.
Soft and porous materials absorb sound. - True or false?
True
False
49.
Concert halls are designed with acoustics in mind. - True or false?
True
False
50.
Soft and porous materials reflect sound better than hard walls. - True or false?
True
False
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Part of Unit 6: Sound and space — see every lesson and quiz in this unit.
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