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Sound and Waves : Physics
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Practice Test
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Question 1 of 36
What is the speed of sound in air at 20°C?
Choose 1 answer
343 m/s
300 m/s
350 m/s
400 m/s
Question 2 of 36
Which type of wave is a sound wave?
Choose 1 answer
Transverse
Longitudinal
Surface
Electromagnetic
Question 3 of 36
What is the unit of frequency?
Choose 1 answer
Decibel
Hertz
Meter
Newton
Question 4 of 36
Which phenomenon explains why a car engine sounds different when it’s moving away from you?
Choose 1 answer
Doppler Effect
Refraction
Diffraction
Interference
Question 5 of 36
What does the decibel (dB) measure?
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Frequency
Intensity
Speed
Wavelength
Question 6 of 36
What type of wave is light?
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Longitudinal
Transverse
Mechanical
Surface
Question 7 of 36
What is the range of human hearing?
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20 Hz to 20 kHz
50 Hz to 15 kHz
100 Hz to 10 kHz
10 Hz to 50 kHz
Question 8 of 36
Which material is the best conductor of sound?
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Air
Water
Steel
Wood
Question 9 of 36
What is the phenomenon where sound bends around obstacles called?
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Refraction
Diffraction
Reflection
Interference
Question 10 of 36
What is the lowest frequency sound that humans can typically hear?
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20 Hz
50 Hz
100 Hz
200 Hz
Question 11 of 36
What effect does increasing the amplitude of a sound wave have?
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Increases pitch
Increases loudness
Increases frequency
Decreases speed
Question 12 of 36
What is the phenomenon where two sound waves of different frequencies combine to form a new sound?
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Interference
Refraction
Doppler Effect
Diffraction
Question 13 of 36
What is the term for the distance between two consecutive peaks of a sound wave?
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Frequency
Amplitude
Wavelength
Speed
Question 14 of 36
Which property of sound changes with the medium it travels through?
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Frequency
Speed
Wavelength
Pitch
Question 15 of 36
What is the term for the sound that is produced when an object vibrates?
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Resonance
Echo
Noise
Tone
Question 16 of 36
What phenomenon is responsible for the sound of thunder?
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Reflection
Refraction
Diffraction
Rapid expansion of air
Question 17 of 36
Which part of the ear is responsible for converting sound vibrations into nerve impulses?
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Outer ear
Middle ear
Inner ear
Auditory nerve
Question 18 of 36
What is the term for a sound wave with a frequency above the audible range for humans?
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Infrasound
Ultrasound
Microwaves
Radio waves
Question 19 of 36
How does the pitch of a sound relate to its frequency?
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Higher frequency = Lower pitch
Lower frequency = Higher pitch
Higher frequency = Higher pitch
No relationship
Question 20 of 36
What type of wave is a radio wave?
Choose 1 answer
Transverse
Longitudinal
Mechanical
Surface
Question 21 of 36
Which phenomenon explains the change in pitch of a passing siren?
Choose 1 answer
Doppler Effect
Refraction
Diffraction
Interference
Question 22 of 36
What is the effect of temperature on the speed of sound?
Choose 1 answer
Higher temperature increases speed
Higher temperature decreases speed
Temperature has no effect
Speed is constant
Question 23 of 36
What term describes the reduction in sound intensity as it travels through a medium?
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Absorption
Reflection
Refraction
Diffraction
Question 24 of 36
What is the primary factor that determines the pitch of a musical note?
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Amplitude
Frequency
Speed
Wavelength
Question 25 of 36
What is the term for sound that is reflected off a surface and heard again?
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Echo
Resonance
Interference
Diffraction
Question 26 of 36
What is the phenomenon called when a sound wave passes from one medium to another and bends?
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Refraction
Diffraction
Reflection
Interference
Question 27 of 36
What is the term for the combination of sound waves that results in a louder sound?
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Constructive interference
Destructive interference
Refraction
Absorption
Question 28 of 36
Which unit measures the loudness of a sound?
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Watt
Hertz
Decibel
Newton
Question 29 of 36
What is the term for the lowest frequency of a vibrating object?
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Fundamental frequency
Overtone
Harmonic
Resonant frequency
Question 30 of 36
Which of the following is not a type of sound wave phenomenon?
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Diffraction
Interference
Resonance
Reflection
Refraction
Question 31 of 36
What is the name of the effect where sound waves bend around the edges of an obstacle?
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Diffraction
Interference
Absorption
Reflection
Question 32 of 36
What term is used to describe sound waves with frequencies below the range of human hearing?
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Ultrasound
Infrasound
Microwaves
Radio waves
Question 33 of 36
What is the term for the change in direction of sound waves as they pass from one medium to another?
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Refraction
Diffraction
Reflection
Absorption
Question 34 of 36
What factor determines the loudness of a sound?
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Frequency
Amplitude
Speed
Wavelength
Question 35 of 36
Which term describes the bouncing of sound waves off a surface?
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Reflection
Refraction
Diffraction
Absorption
Question 36 of 36
What is the term for the phenomenon where two sound waves of slightly different frequencies produce a fluctuating sound intensity?
Choose 1 answer
Beats
Echo
Resonance
Interference
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