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Electromagnetic Waves & Metric System Quiz

Total questions: 75

Worksheet time: 6hrs 15mins

Name
Class
Date
1.
A __________ is a piece of information that is communicated using the senses.
a)
signal
b)
wave
c)
noise
d)
warning
2.
__________ is the unwanted modification of a signal.
a)
signal
b)
wave
c)
noise
d)
warning
3.
True or False: An analog signal is one that changes continuously
a)
True
b)
False
4.
True or False: Radio waves are an example of a digital signal.
a)
True
b)
False
5.
True or False: Digital signals are more affected by noise than analog signals.
a)
True
b)
False
6.
True or False: The more pixels a digital image consists of, the clearer the image.
a)
True
b)
False
7.
Computers use a series of __________ numbers to encode information.
a)
even
b)
odd
c)
binary
d)
random
8.
Which is the best model of an analog signal?
a)
a smooth wave
b)
a light switch going on and of
c)
a series of 1's and 0's
d)
a series of pulses
9.
Which best compares the reliability of analog signals and digital signals?
a)
Only analog signals are reliable.
b)
Digital signals are more reliable than analog signals
c)
Analog signals are more reliable than digital signals.
d)
Both types of signals are equally reliable.
10.
For which type(s) of signals does noise alter the original information?
a)
analog only
b)
digital only
c)
both analog and digital
d)
neither analog and digital
11.
Which best describes binary numbers?
a)
a continuously changing wave
b)
a set of two discrete values
c)
a large array of values
d)
a set of four or five numbers
12.
Oliver knows there are different types of waveforms, both analog and digital. He analyzes the wave below to determine which type of information is stored in the wave. Is this most likely an analog or digital signal?
a)
digital because the amplitude is only ever a certain set of values
b)
digital because the amplitude contains all values within a range
c)
analog because the amplitude is only ever a certain set of values
d)
analog because the amplitude contains all values within a range
13.
Rochelle works in a movie theater. She notices that the movie theater stores all of its movies using digital devices instead of analog film reels. Why might the theater have started storing movies using digital signals?
a)
Analog signals can change over time and can be harder to transmit.
b)
Digital signals carry more information than analog signals.
c)
Analog signals are not able to store visual information as well as digital signals.
14.
Marvin is choosing a new radio for his car. One radio can only pick up analog signals and the other can pick up digital signals. Harvey wants to make sure that the radio won’t be easily affected by interference. Would an analog or digital signal have a less noisy signal, and how do you know?
a)
Analog because the radio waves will be less affected by interference than the digital signal’s radio waves.
b)
Analog because noise can be removed from analog signals.
c)
Digital because the radio waves will be less affected by interference than the analog signal’s radio waves.
d)
Digital because noise can be removed from digital signals.
15.
Vinyl records store music as an analog signal. CDs store music as a digital signal. Over time, the sound of music played from a vinyl record changes. But the music from a CD sounds the same each time. Why does the CD sound more consistent than the vinyl record?
a)
Interference can’t affect a digital signal.
b)
The information in a digital signal is less likely to be affected by interference.
c)
Digital signals contain more information than analog signals.
16.
Adriel was listening to music streaming from a cell phone. The sound was clear with no interference until he entered a garage and went down to the 4th level for parking. Then, the music stopped playing entirely. Is the music signal most likely an analog or digital signal, and how do you know?
a)
Analog because the music was always clear until it stopped playing.
b)
Digital because the music was always clear until it stopped playing.
c)
Analog because the signal reaches into the parking garage.
d)
Digital because the signal reaches into the parking garage.
17.
Jose is visiting a music recording studio. He notices that the studio stores music using digital signals instead of analog signals. What is a possible problem with storing music using analog signals?
a)
Analog signals can change over time and can be harder to copy accurately.
b)
Analog signals are not able to store sound information accurately.
c)
Digital signals carry more information than analog signals.
18.
True of False: Sign language and written language are examples of signals used to communicate.
a)
True
b)
False
19.
True or False: Before a signal is sent, it must be decoded.
a)
True
b)
False
20.
Electronic signals can travel very long distances in optical fibers, due to __________.
a)
total external reflection
b)
total external refraction
c)
total internal refraction
d)
total internal reflection
21.
What do all signals that are used to communicate have in common?
a)
They all involve light waves.
b)
They all send information.
c)
They all use printed words.
d)
They all use a series of sounds.
22.
What is a disadvantage of using radio waves to transmit information?
a)
They do not permanently move matter.
b)
They can travel over long distances.
c)
They can be varied to hold information
d)
They lose energy as they travel through mediums.
23.
How does noise affect a signal?
a)
It causes the signal to deteriorate.
b)
It amplifies the signal.
c)
It allows the signal to travel further.
d)
It changes the signal as it moves from one medium to another.
24.
Which correctly orders the steps of communication using signals?
a)
transmit, encode, decode
b)
encode, transmit, decode
c)
decode, transmit, encode
d)
transmit, decode, encode
25.
All of the following are types of electromagnetic waves that can be used to transmit signals except ________________.
a)
sound waves
b)
light waves
c)
radio waves
d)
microwaves
26.
Which metric prefix would you use to measure something large?
a)
kilo
b)
centi
c)
milli
27.
All sound waves are longitudinal.
a)
True
b)
False
28.
The Law of Reflection states that when a wave is reflected from a surface, _______________________.
a)
the angle of the reflection is greater than the angle of incidence.
b)
the angle of the reflection is complimentary to the angle of incidence.
c)
the angle of the reflection is equal to the angle of incidence.
d)
the angle of the reflection is less than the angle of incidence.
29.
A __________ is an image that forms from light rays that diverge or change direction.
a)
virtual image
b)
regular reflection
c)
diffuse reflection
d)
real image
30.
A red ball reflects which of the following colors of light?
a)
red
b)
all colors but red
c)
green
d)
white
31.
In blue light, a red object would look _______.
a)
red
b)
blue
c)
black
d)
white
32.
__________ are cells in the eye that enable a person to see color.
a)
Rods
b)
Cones
c)
Retina
d)
Cornea
33.
__________ is one of the first people to record notes on the refraction of white light.
a)
Albert Einstein
b)
Sir Issac Newton
c)
Charles Darwin
d)
Bill Nye
34.
As wavelength increases, frequency __________.
a)
increases
b)
decreases
c)
does not change
35.
____________ wavelengths refract the most because their frequencies are the highest.
a)
Red
b)
Green
c)
Blue
d)
Violet
36.
When an object appears black, it is because __________.
a)
it reflects all colors of light
b)
it absorbs all colors of light
c)
it transmits all colors of light
d)
it scatters all colors of light
37.
Which color of light has the lowest frequency?
a)
red
b)
orange
c)
green
d)
violet
38.
When white light passes through a prism, it separates into a spectrum of colors because of __________.
a)
refleciton
b)
refraction
c)
absorption
d)
diffraction
39.
What color light is produced when all colors of light are combined?
a)
red
b)
white
c)
yellow
d)
black
40.
__________ is the change in direction of a wave as it changes speed while moving from one medium to another.
a)
Refraction
b)
A Lens
c)
A Concave Lens
d)
A Convex Lens
41.
__________ is a transparent object with at least one curved side that causes light to change direction.
a)
Refraction
b)
A Lens
c)
A Concave Lens
d)
A Convex Lens
42.
This picture best illustrates _______________.
a)
Refraction
b)
A Lens
c)
A Concave Lens
d)
A Convex Lens
43.
Using the table below to answer the question. True or false: When light travels from air to oil, it bends toward the normal.
a)
True
b)
False
44.
The human eye has two ___________ lenses.
a)
concave
b)
convex
45.
In the figure shown, the light waves change direction as a result of _____.
a)
reflection
b)
absorption
c)
defraction
d)
refraction
46.
A medium that has a high index of refraction is sometimes called __________.
a)
fast
b)
slow
c)
high
d)
low
47.
The part of the eye that can change its structure to form a focused image is the __________.
a)
pupil
b)
cornea
c)
iris
d)
retina
e)
Option 2
48.
When parallel light rays hit a convex lens, they __________.
a)
are refracted and spread out
b)
are refracted and pass through a focal point
49.
Which of the following items has lenses?
a)
glasses
b)
cameras
c)
human eyes
d)
all of the above
50.
A __________ is the reflection of light from a smooth, shiny surface.
a)
virtual image
b)
regular reflection
c)
diffuse reflection
d)
real image
51.
A __________ is reflection of light from a rough surface.
a)
virtual image
b)
regular reflection
c)
diffuse reflection
d)
real image
52.
A __________ is one that forms where rays converge.
a)
virtual image
b)
regular reflection
c)
diffuse reflection
d)
real image
53.
The inside of a spoon (where the food goes) would be an example of __________.
a)
a concave mirror
b)
a convex mirror
c)
a regular reflection
d)
a defuse reflection
54.
The outside of a spoon (the part that doesn't hold the food) would be an example of __________.
a)
a concave mirror
b)
a convex mirror
c)
a regular reflection
d)
a defuse reflection
55.
A mirror that curves inward is called a __________.
a)
a concave mirror
b)
a convex mirror
c)
a regular reflection
d)
a defuse reflection
56.
A mirror that curves outward is called a __________.
a)
a concave mirror
b)
a convex mirror
c)
a regular reflection
d)
a defuse reflection
57.
A reflection from a pond with ripples would be an example of a/an __________.
a)
a concave mirror
b)
a convex mirror
c)
a regular reflection
d)
a defuse reflection
58.
___________ is the number of times a wave pattern repeats in a given amount of time.
a)
Loudness
b)
Frequency
c)
Amplitude
d)
Intensity
59.
Waves have either amplitude or frequency, but not both.
a)
True
b)
False
60.
__________ is electromagnetic radiation that you can see.
a)
Light
b)
Radiant Energy
c)
Frequency
d)
Wavelength
61.
__________ is energy carried by an electromagnetic wave.
a)
Light
b)
Radiant Energy
c)
Frequency
d)
Wavelength
62.
If an object or substance is __________, you can see through it.
a)
transparent
b)
translucent
c)
opaque
63.
If an object or substance is __________, some light can pass through it.
a)
transparent
b)
translucent
c)
opaque
64.
True or False: Light travels faster than sound.
a)
True
b)
False
65.
The energy of an electromagnetic wave is related to its __________.
a)
amplitude
b)
frequency
c)
wavelength
66.
A window would be an example of a __________ object
a)
transparent
b)
translucent
c)
opaque
67.
The most common base units in the metric system are __________, __________ and __________.
a)
kilos, centis and decis
b)
liquids, solids and gasses
c)
mass, length and volume
d)
meters, liters and grams
68.
How many meters are in 2 kilometers?
a)
1 meter
b)
200 meters
c)
20 meters
d)
2000 meters
69.
How many centimeters are in a meter?
a)
100 centimeters
b)
10 centimeters
c)
1000 centimeters
d)
1 centimeter
70.
How many grams are in 1 kilogram?
a)
1000 grams
b)
100 grams
c)
10 grams
71.
What base unit is most appropriate to measure length?
a)
meter
b)
centi
c)
gram
d)
kilo
72.
What base unit is most appropriate to measure mass?
a)
meter
b)
centi
c)
gram
d)
kilo
73.
What is volume?
a)
the amount of matter something has
b)
the amount of something from one end to the other
c)
the amount of space something takes up
74.
What would be the most appropriate metric unit to measure the space between school and The Strip?
a)
miles
b)
kilometers
c)
kiloliters
75.
True or False: There are 100 degrees between the boiling point of water and the melting point of ice on the Celsius scale.
a)
True
b)
False