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WorksheetsEM Spectrum and Wave Communication Quiz
Total questions: 35
Worksheet time: 23mins
Which electromagnetic waves are used in ovens and cell phone communications?
microwaves
infrared rays
gamma rays
ultraviolet rays
A wave with a large wavelength will have a ______ frequency and _____ energy
high, low
low, high
high, high
low, low
How are different types of radiation arranged along the electromagnetic spectrum?
By how fast they travel
By their sources
By the amount of energy they carry
By how radioactive they are
Time mentions that infrared radiation can be used to take special pictures called thermographs. "Graph" means "image." What can you infer about the prefix "thermo?"
It means "light"
It means "energy"
It means "heat"
It means "radio"
Which word best describe gamma rays?
Weak
Destructive
Visible
Harmless
What do all forms of electromagnetic radiation have in common?
Their strength
Their speed
Their wavelength
Their frequency
This is an example of light been -
Absorbed
Transmitted
Reflected
This is an example of light been -
Absorbed
Transmitted
Reflected
How are we able to see the color white?
All colors except red are absorbed
All colors are absorbed
All colors are reflected
All colors except red are reflected
It is far more difficult to make a perfect copy of an analog wave because...
the exact value of any one piece of information is not clearly defined.
most analog waves have wavelengths that are too long to reproduce in copies.
analog waves travel at speeds too great for modern technologies to use.
each individual piece of information is either a zero, a one, or a two.
Why does a music studio likely use digital technology for recording rather than analog technology?
Digital technology has been used longer than analog technology.
Digital technology can store information more reliably than analog technology.
Digital technology produces more background noise in recordings than analog technology.
Digital technology cannot be changed while analog technology can easily be modified.
Which of these statements best describes how digital data compares to analog data?
Digital data takes more space to store than analog does.
Digital data records more unwanted background noise than analog does.
Digital data can be stored for a longer period of time than analog can.
Digital data transmits signals more slowly than analog can.
How is the information from the audio wave stored after it is processed by the analog-to-digital converter?
It is stored as a table of ones and twos because it was converted to a radio wave.
It is stored as images because it was converted to mathematical equations.
It is stored as a series of ones and zeros because it was converted to binary data.
It is stored as graphs because it was converted to base ten data.
Why do people see distant events before they hear them?
Light travels faster than sound.
Sound travels faster than light.
Human eyes are more sensitive than human ears.
Human brains can only process events in that order.
Both analog and digital waves can experience noise as they travel. Noise is any unwanted signal that distorts or reshapes the original wave. The diagram below illustrates how the resulting waves might appear. The example above suggests that...
digital waves cannot have noise or other distortions removed from them.
there is no clear advantage to transmitting digital waves over analog waves.
analog waves do not experience as much noise as digital waves.
noise is less of a problem for digital waves than for analog waves.
Which of the following statements best explains why digital waves are commonly used in high-frequency wireless networks instead of analog waves?
Small disruptions in analog waves are more easily corrected than in digital waves.
It is easier to correct small disruptions in digital waves than in analog waves.
Analog waves cannot reach large enough wavelengths to be used in wireless networks.
Analog waves cannot reach high enough amplitudes to be used in wireless networks.
A wave is a disturbance that transfers ________ from one place to another.
Matter
Mass
Energy
What types of waves can travel through empty space AND mediums?
Longitudinal
Mechanical
Electromagnetic
Which of the following is a mechanical wave?
X-ray
Infrared
Radio waves
Sound
The number of waves passing a given point each second is:
Frequency
Wave speed
Wavelength
Amplitude
Frequency is expressed in units called ___________________
Newtons (N)
Microns (Mc)
Hertz (Hz)
Periods (Pd)
Wave A and Wave B have the same frequency and wavelength. Wave A has a greater amplitude than Wave B. Which statement BEST compares the two waves?
Wave A has more energy than Wave B
Wave B has more energy than Wave A
Wave B transmits energy through matter, while Wave A does not.
Wave A transmits energy through matter, while Wave B does not.
On vacation, you bring a radio to the beach. The radio can pick up several different radio stations. Which is the best explanation for this?
Sound waves can travel through the air from the station to your radio.
Radio stations broadcast from different locations using their own transmitters.
Sound of different pitches are used to transmit information from each radio station. These sound waves can travel over land.
Waves are used to transmit the radio signal through the air. These waves are encoded at different frequencies for different stations.
3) Sign language and written language are examples of signals used to communicate.
True
False
What do all signals that are used to communicate have in common?
They all involve light waves.
They all send information.
They all use printed words.
They all use a series of sounds.
What is a disadvantage of using radio waves to transmit information?
They do not permanently move matter.
They can travel over long distances.
They can be varied to hold information.
They lose energy as they travel through mediums.
Compare the two signals. Signal B...
(select ALL true statements)
is moving faster
has more noise
is not as clear or reliable
has more energy
How does increasing the noise of a signal affect the quality of the wave?
it increase the quality
it decreases the quality
the quality is not affected
it only affects it if you are far away
Analog encoding sends or stores information using quantities that
can vary continuously.
can only have specific values.
are separated by consistent numbers.
store waves’ crest and trough sizes in small steps.
Digital encoding sends or stores information using quantities that
can vary continuously.
can only have specific values.
have no numeric gaps between one another.
create smooth curves inside a sound wave.
AM and FM radio stations
switch between analog and digital signals to broadcast sound waves.
transmit sound using multiple frequency ranges, including radio waves, visible light, and ultraviolet light.
change the amplitude or frequency of waves to encode sounds.
convert broadcasts into binary code.
Why are digital signals less likely to be affected by noise than analog signals?
There are more sources of analog noise than digital noise.
Digital waves have higher amplitudes, and thus overpower noise
Non-binary noise can be easily filtered out by digital systems.
Analog radios add noise to the signals they receive to improve sound quality.
