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Worksheets9.2 Sound
Total questions: 33
Worksheet time: 34mins
Sound waves can travel through: (a) , but cannot travel through (b)
A sound wave is a type of:
longitudinal wave
transverse wave
mechanical wave
electromagnetic wave
Sound waves require a (a) to travel through.
You usually hear sound through the medium of:
air
water
fire
earth
Sound waves travel fastest in
(a) , and slowest in (b)
A sound wave with a greater intensity will produce:
a louder sound
a softer sound
a lower pitch sound
a higher pitch sound
__________ is the maximum distance particles in a medium move from their rest position.
Frequency
Amplitude
Wave Speed
Wavelength
The perception of how low or high a sound seems is called (a) .
The pitch of a sound is directly related to its
frequency
amplitude
intensity
loudness
High pitched sounds have a relatively large (a) and small (b) .
The human ear can detect frequencies between:
20 and 20,000 Hz
100 and 200 Hz
1 and 100 Hz
20 and 100,000 Hz
Frequency is measured in:
decibels
Hertz
meters
seconds
the sound source must be moving
the listener must be moving
both the source and listener must be moving
either the source or listener must be moving
Reverberation (echoes) in concert halls are caused by ___ of sound.
reflection
interference
refraction
diffraction
Sonar is a system that uses the _________ of underwater sound waves.
reflection
refraction
diffraction
resonance
How can you increase the loudness of a sound?
increase the amplitude
increase the wavelength
increase the frequency (pitch)
decrease the distance from the source
Sound waves with frequencies greater than 20,000 Hz are called (a) waves, while sound waves with frequencies below 20 Hz are called (b)
___ is when a sound wave matches the natural frequency of an object and increases in amplitude.
Reflection
Resonance
Pitch
Ultrasonic
What is the speed of sound in air at room temperature?
150 m/s
346 m/s
3,000 m/s
300,000 km/s
the frequency
the medium
the amplitude
the air temperature
Standing waves are created by
Two identical waves (same frequency and wavelength) reflecting off each other
Two identical waves (same frequency and wavelength) being diffracted together
Two identical waves (same frequency and wavelength) move through each other in opposite directions
Two identical waves (same frequency and wavelength) are diffracted from two identical sources
In the diagram which letters represent the nodes
A B C
A C E
B D
B D E
The moving dot is called:
a node
an anti-node
the amplitude
the frequency
Wavelength
How long the wave is
Amplitude
How far the particles vibrate away from their resting position
Speed
How fast the wave moves through the medium
Period
How much time it takes the particles to complete a vibrational cycle
Frequency
How many times the particles vibrate about their fixed position
If a person yells (as opposed to whispering), then it will cause...
air molecules to vibrate more frequently
the sound wave to travel faster
air molecules to vibrate with greater amplitude
the sound wave to travel slower
