Glencoe Science
Chapter Resources
Electromagnetic
Waves
Includes:
Reproducible Student Pages
ASSESSMENT
TRANSPARENCY ACTIVITIES
✔ Chapter Tests
✔ Section Focus Activity
✔ Chapter Review
✔ Teaching Transparency Activity
✔ Assessment Transparency Activity
HANDS-ON ACTIVITIES
✔ Lab Worksheets for each Student Edition Activity
Teacher Support and Planning
✔ Laboratory Activities
✔ Content Outline for Teaching
✔ Foldables–Reading and Study Skills activity sheet
✔ Spanish Resources
✔ Teacher Guide and Answers
MEETING INDIVIDUAL NEEDS
✔ Directed Reading for Content Mastery
✔ Directed Reading for Content Mastery in Spanish
✔ Reinforcement
✔ Enrichment
✔ Note-taking Worksheets
Name
Date
Directed Reading for
Content Mastery
Class
Overview
Electromagnetic Waves
Directions: Complete the concept map using the terms in the list below.
radiant energy
matter
X rays
ultraviolet waves
infared waves
visible light
Meeting Individual Needs
Electromagnetic
waves
have
1.
and can
travel through
and can
travel in a
2.
vacuum
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and include
3.
4.
5.
6.
radio
waves
gamma
rays
Directions: Listed below are nine ordinary activities. Write a Y on the line beside each act that requires or
produces electromagnetic waves. Write an N beside those that do not.
7. listening to CDs
12. getting a suntan
8. whispering in someone’s ear
13. reading a book
9. examining luggage at an
airport
14. making toast
15. playing a drum
10. smelling perfume
11. making ripples in water
Electromagnetic Waves
19
Name
Date
Directed Reading for
Content Mastery
Section 1
■
Class
What are
electromagnetic
waves?
Directions: Draw a line between each type of energy on the left to the phrase that describes this type of energy
on the right.
electromagnetic wave
2. vibrating electric charge
number of vibrations per second
3. frequency
dependent on material
4. photon
moving electric charge
5. wave speed
carries radiant energy
Directions: Circle the term that correctly completes the sentence.
6. Electromagnetic waves are made by vibrating electrical charges that travel
through (space, matter).
7. Particles with the (same, opposite) electric charge repel each other, while particles
with the (same, opposite) charge attract each other.
8. As the frequency of a wave (increases, decreases), the wavelength becomes smaller.
9. The (speed, intensity) of the wave depends upon the material the wave travels
through.
10. The energy carried by an electromagnetic wave is called
(radiant energy, magnetism).
11. One Hz is one vibration each (second, minute).
12. Light can behave as a particle, called a (neutron, photon) whose energy
depends on the frequency.
13. All electromagnetic waves travel at 300,000 km/s through a (vacuum, diamond).
20 Electromagnetic Waves
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Meeting Individual Needs
1. magnetic field
Name
Date
Directed Reading for
Content Mastery
Class
Section 2 The Electromagnetic
Spectrum
Section 3 Radio Communication
■
■
Directions: Write the term that matches each description in the spaces provided. The vertical boxed letters will
answer question 13.
1. The speed of an electromagnetic wave is affected by the
_____ it travels through.
1
2. Method of finding position and
movement of objects using
radio waves
Meeting Individual Needs
2
3
4
3. Ultraviolet light can kill these.
5
4. You feel _____ waves as heat.
5. A system of satellites that help
locate a specific place on the
Earth’s surface
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
6. Gamma rays and X rays are
useful when used in _____.
6
7
8
7. Radio signals are broadcast by
_____ waves.
8. _____ light can be detected by
the eye.
9. Radio waves carry a _____
from a station to your home.
9
10
11
12
10. _____ can heat your food.
11. The layer of Earth’s atmosphere vital to life
12. When protons flip in a magnetic field, _____ is released.
13. How are radio waves moved from place to place?
Electromagnetic Waves
21
Name
Date
Directed Reading for
Content Mastery
Class
Key Terms
Electromagnetic Waves
Directions: Complete the following sentences using the terms listed below.
X rays
Global Positioning System
electromagnetic waves
carrier wave
cathode-ray tube
ultraviolet rays
infrared rays
transceiver
frequency
gamma rays
radio waves
radiant energy
photon
visible light
and altitude on Earth.
2. The rays that can damage skin are known as ____________________.
3. Energy transmitted by ____________________ will feel warm.
4. Doctors and dentists can apply low doses of ____________________ onto
photographic film.
5. Radiation therapy uses ____________________ to kill diseased cells.
6. ____________________ are not the same as sound waves.
7. Cordless and cellular telephones are examples of ____________________.
8. Vibrating electric charges that travel though space are known as
____________________.
9. The ____________________ is the frequency of the electromagnetic wave
that the radio station is assigned.
10. The picture part of the television is the ____________________.
11. ____________________ is measured in hertz.
12. ____________________ is energy carried by an electromagnetic wave.
13. The type of electromagnetic waves that you have the most experience
with is ____________________.
14. The energy of the ____________________ is dependent on its frequency.
22 Electromagnetic Waves
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Meeting Individual Needs
1. By using the ____________________ you can determine your exact position
Name
1
Date
Reinforcement
Class
What are electromagnetic
waves?
Directions: Answer the following questions on the lines provided.
1. Compare and contrast sound waves and electromagnetic waves.
Meeting Individual Needs
2. What vibrates to produce electromagnetic waves?
3. How are moving electric charges related to electric and magnetic fields?
4. What is radiant energy? What does it do?
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
5. How are wavelength, frequency, intensity, and energy related in an electromagnetic wave?
6. What is the speed of electromagnetic waves in a vacuum? In air? In water?
7. Describe photons.
8. Describe how Heinrich Hertz showed waves acting as particles. Include in your description the
effect of frequency and intensity.
Electromagnetic Waves
27
Name
2
Date
Reinforcement
Class
The Electromagnetic
Spectrum
1. Arrange the following types of waves from lowest to highest frequency with 1 being the lowest
and 7 being the highest.
a. microwaves
b. visible light
c. gamma rays
d. radio waves
f. X rays
g. ultraviolet waves
Directions: For each of the following, write the letter of the term or phrase that best completes the sentence.
2. The range of frequencies in which electromagnetic waves occur is called the ______.
a. radar
c. UVB rays
b. electromagnetic spectrum
d. visible light
3. Radio waves make ______ vibrate.
a. electrons
b. molecules
c. light particles
d. photons
4. ______ are used in Magnetic Resonance Imaging to map body tissues..
a. X rays
c. infrared waves
b. radio waves
d. ultraviolet waves
5. ______ are absorbed by the ozone layer.
a. infrared waves
c. radio waves
b. gamma rays
d. ultraviolet waves
6. Radio waves with wavelengths of less than 1 m are called ______.
a. gamma rays
c. infrared light
b. X rays
d. microwaves
7. Warmth that you feel from a fire is transmitted to you by ______.
a. infrared waves
c. MRI
b. ultraviolet rays
d. radio waves
8. The range of electromagnetic waves that you can detect with your eyes is ______.
a. infrared waves
c. microwaves
b. visible light
d. X rays
28 Electromagnetic Waves
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Meeting Individual Needs
e. infrared waves
Name
3
Date
Class
Radio Communication
Reinforcement
Directions: Answer the following questions on the lines provided.
1. Trace a radio broadcast from the radio station transmitter to your ear.
Meeting Individual Needs
2. What is a carrier wave and how does it affect what you hear on the radio?
3. Compare and contrast AM and FM radio transmission.
A
C
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
B
4. In the figure above, name the parts of a cathode-ray tube indicated and give the use of each part.
A.
B.
C.
5. Cell phones and cordless phones are transceivers. What does this mean?
6. Describe G.P.S. and give two uses for it.
7. Why is satellite telephone service best for one-way communication?
Electromagnetic Waves
29
Name
Enrichment
Class
Sunspots and
Electromagnetic Waves
Meeting Individual Needs
Sunspots are magnetic storms on the Sun
that can produce ejections of heated gases that
extend for great distances from the surface of
the Sun. Sunspots are areas of intense magnetic fields on the surface of the Sun. Groups
of sunspots are often sites of flares. The flares
are produced by the tearing and reconnecting
of these strong magnetic fields which are present in the sunspot groups.
Sunspot Cycles
The Sun appears to go through a cycle of
producing a large number of sunspots. This
increase in activity produces a source of solar
wind from the hot corona that comes off the
Sun in all directions. The wind is made up of
high speed particles, including protons, electrons (beta particles), and nuclei of helium
atoms (alpha particles). These particles have
an electric charge. It is the increase in the
number and energy of the particles during a
flare event that interferes with electromagnetic
waves on Earth.
Magnetic Protection
On Earth, we are protected from the electromagnetic waves of the Sun by our magnetic field.
The magnetic field covers the entire planet and
protects us from most of the emissions from
the Sun. As the particles come in contact with
the magnetosphere (the region of the magnetic
field on Earth), the charged particles are
deflected into space.
Changing Shape
However, during times of high sunspot activity
the solar wind also increases. This flattens the
magnetic field on the side facing the Sun. On the
opposite side, the magnetic field is shaped like a
water drop. The magnetic field is not strong
enough to keep out all the electromagnetic waves
from the Sun.
We interrupt this program . . .
This sunspot activity and the flares that are
produced interfere with electromagnetic waves
made on the surface of Earth. Radio and television signals are interrupted. Satellites and other
transmission sources are also interrupted. Fortunately, we do not have to encounter a great
deal of disturbance all the time. The sunspots
seem to increase in number only during cycles
that occur about every 11 years.
1. What kinds of particles does the Sun eject in the solar wind?
2. What protects Earth from the solar wind? How does this happen?
3. What happens to communications on Earth when part of the solar wind enters the atmosphere?
4. How often do we experience increased electromagnetic wave interference on Earth?
30 Electromagnetic Waves
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1
Date
Name
Enrichment
Radioactive glass?
Did you know that some of the world’s
most beautiful glass is radioactive? Around
1880 a very popular glass was made with
uranium. Uranium is a radioactive element
that gives off gamma waves in high amounts.
Nuclear reactors that provide energy for whole
cities use uranium because it gives off so
much energy. However, people did not know
this about radioactivity back in the 1800s.
Vaseline Glass
Uranium, in its natural state, is an attractive
green-yellow color and was added to glass to
give it color. At one time, this type of glass was
called vaseline glass because its color resembled
that of the household product with the same
name. Today the name is used to describe a
variety of different glass types.
Black Light and Green Glass
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Class
Because uranium is radioactive, it glows
under an ultraviolet lamp, or “black light” as it
is called today. The glow is a distinctive shade
of green. Antiques dealers test Vaseline glass
by seeing if it glows under this kind of light.
Some newer imitations glow, but they are
usually orange in color and do not show the
true green color of uranium’s electromagnetic
frequency.
The Dangers of Glass
There are stories that the Vaseline glass
factories were shut down in the mid–1900s
because workers became ill and died from
exposure to uranium. However some scientific
evidence suggests this was not entirely true.
Rather, the outbreak of World War II stopped
production. Uranium was used to make atomic
bombs. Uranium became very valuable and
governments were afraid it would fall into the
wrong hands. It became illegal to make Vaseline
glass. Today a few companies are allowed to
make the glass. They create very few pieces
because uranium is expensive and scarce. Also,
the workers must wear special protective
clothing to work around the uranium.
If you see Vaseline glass in a museum, ask to
see if it will glow. The glass will still produce a
bit of radioactivity, but it is so small it will not
harm you. The color is beautiful!
1. What radioactive chemical is used to give a special color to Vaseline glass?
2. What property of the chemical makes it dangerous?
3. If you wanted to test whether a piece of glass was really Vaseline glass, how would you do it,
and why?
4. Why was it illegal to make Vaseline glass for a while?
Electromagnetic Waves
31
Meeting Individual Needs
2
Date
Name
Enrichment
Class
FM Radio Stations
Meeting Individual Needs
Have you ever searched for a radio station
with a dial or search button on a radio? Were
you surprised at how many stations you passed?
If you live in a large city, there were probably
lots of stations to choose from. How do you
suppose all those radio stations stay separated
from one another? The answer lies in the rules
created by the Federal Communication
Commission (FCC).
The lower end of the FCC scale for radios is
88.1 MHz. Below this is reserved for television
stations. Radio waves would interfere with
television waves, hampering communications.
However, the FCC will allow radio broadcasts
to produce transmissions lower than
88.1 MHz if the carrier wave does not go
farther than about 60 meters.
Interference
What about radio antennas?
You have learned that FM radio waves have a
variety of frequency carrier waves. If two radio
stations broadcast on the same frequency, they
would interfere with each other. The interference would make it impossible to hear either
station very well. The FCC, therefore, made
rules that radio stations must follow.
Antennas pick up radio frequencies and
reamplify them to provide strength for
traveling longer distances. The FCC has strict
regulations on where a radio station can
place an antenna. There are so many EMF
waves with antennas that they cannot be too
near homes or other buildings. They must be
at least 3 to 16 km from the transmitter site.
Obviously you would not want to put an
antenna in a valley where it could not receive
the radio waves. However, putting it high on
a hilltop requires special permission to make
sure it is not in the path of airplanes.
Airplane Safety
One of the first rules is that no one can
broadcast above 107.9 MHz. This is because
airplanes communicate with the ground and
each other on these frequencies. If a radio
station’s carrier wave were to interfere with
instructions from a control tower to an
airplane, lives could be put at risk.
The Lower End
1. What do the letters FCC stand for?
2. Why is it illegal for a radio station to broadcast above 107.9 MHz?
3. Why is it illegal to broadcast below 88.1 MHz?
4. What is the exception for broadcasting below 88.1 MHz?
32 Electromagnetic Waves
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3
Date
Name
Date
Note-taking
Worksheet
Section 1
Class
Electromagnetic Waves
What are electromagnetic waves?
A. Electromagnetic waves are made by vibrating electric charges and can travel through
_______________.
B. Electric and magnetic fields—related _______________ that operate even in empty space
2. _________________ magnetic fields create changing electric fields and vice versa.
C. Electromagnetic waves are produced when an electric charge is __________________.
1. Vibrating electric charges are ___________________ by vibrating electric and magnetic fields.
2. Vibrating electric and magnetic fields travel ________________ from the moving charge.
D. Properties of electromagnetic _______________—carry radiant energy
1. Frequency and wavelength—as frequency __________________, wavelength decreases
a. Frequency is the number of ___________________ per second; measured in hertz.
b. Wavelength is the _________________ from one crest to another and is measured in
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
meters.
2. Wave speed—in the vacuum of space, _____________________; electromagnetic waves
slow as they travel through matter.
E. Waves and particles—____________________ not clear
1. Light can behave as a particle, a _______________, whose energy depends on frequency.
2. All __________________ can behave like a wave
Section 2
The Electromagnetic Spectrum
A. The entire ______________ of electromagnetic wave frequencies is called the electromagnetic
spectrum.
B. ______________ waves—low-frequency electromagnetic waves with wavelengths from less
than a centimeter to about 1000 meters
1. Microwaves—radio wave lengths of about 1 to ________ cm
2. ______________—radio waves bounced off an object to determine its speed and location
Electromagnetic Waves
33
Meeting Individual Needs
1. A _______________ electric charge creates a magnetic field.
Name
Date
Class
Note-taking Worksheet (continued)
3. ___________________________________ (MRI)—radio waves produce an image of the
inside of the body
C. Infrared waves—electromagnetic wave with a slightly _______________ frequency than radio
waves; people feel it as thermal energy or warmth
D. ______________________—has wavelengths between about 390 to 770 billionth of a meter;
can be seen with the eye
E. __________________________—have frequencies slightly higher than visible light; can
1. Ultraviolet light can kill _________________.
2. Ultraviolet light can be absorbed by some ____________________ materials and released
as visible light.
3. ______________ layer above Earth’s surface absorbs most of the Sun’s harmful ultraviolet waves.
F. _______________ and gamma rays—ultra-high-frequency electromagnetic waves that can
travel through matter, break molecular bonds, and damage cells
1. X rays are used to provide images of ______________ and to examine suitcases at airports
without opening them.
2. Radiation therapy is used to _____________ diseased cells.
Section 3
Radio Communication
A. Radio _____________________—radio converts electromagnetic waves into sound waves
1. The _____________________ is the specific frequency of the radio wave to which a radio
station is assigned.
2. AM radio stations broadcast electronic signals by varying the __________________ of the
carrier wave; frequencies range from 540 to 1,600 thousand vibrations per second.
3. FM radio stations transmit electronic signals by varying the __________________ of the
carrier wave; frequencies range from 88 million to 108 million vibrations per second.
34 Electromagnetic Waves
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Meeting Individual Needs
damage skin
Name
Date
Class
Note-taking Worksheet (continued)
B. ___________________—sounds and images changed into electronic signals broadcast
by carrier waves
1. Audio sent by ___________ radio waves.
2. Video sent by ___________ signals.
3. A sealed vacuum chamber called a cathode-ray tube has a coated screen that receives
____________________ to provide images.
Meeting Individual Needs
C. Telephones—microphone converts ____________________ into electrical signal
1. ___________________—electrical signal creates a radio wave that is transmitted to and
from a microwave tower
2. _______________________—uses a transceiver to send one radio signal and receive
another at a different frequency from a base unit
3. _______________—a radio receiver on which a message is left
D. Communication satellites—high frequency __________________ signal is transmitted to a
satellite, which amplifies it and returns it to Earth at a different frequency
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
1. Satellite telephone systems—_______________ phones transmit radio signals to a satellite,
which relays them back to a ground station that passes the call into the telephone network
2. Television satellites—uses ___________________ rather than longer-wavelength radio
wave; ground receiver dish focuses the microwave beam onto an antenna
E. ___________________________ system—system of satellites, ground stations, and receivers
that provide information about the receiver’s location on or above the Earth’s surface
Electromagnetic Waves
35
Name
Date
Class
Electromagnetic Waves
Chapter
Review
Part A. Vocabulary Review
Directions: Write the correct term in the space by each definition. To answer question 15, unscramble the boxed
letters to spell a part of a television set.
1. frequency of electromagnetic waves that a radio station is assigned
___ ___ ___ ___ ___ ___
___ ___ ___ ___
2. energy carried by electromagnetic waves
___ ___
___ ___ ___ ___
___ ___ ___ ___ ___ ___
3. waves with wavelengths shorter than visible light that are used to kill bacteria
___ ___
___ ___ ___ ___ ___ ___ ___ ___
___ ___ ___ ___ ___
4. highest energy electromagnetic radiation ___ ___ ___ ___
___ ___ ___ ___
5. waves produced by an oscillating electric charge
___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___
___ ___ ___
___ ___ ___ ___ ___
6. electromagnetic waves with the longest wavelengths
___ ___ ___ ___ ___
___ ___ ___
___
___ ___ ___ ___ ___ ___ ___ ___ ___ ___
8. waves with wavelengths between radio and visible light
___ ___ ___
___ ___ ___ ___
___ ___ ___ ___ ___
9. number of waves that pass a certain point in a second ___ ___ ___ ___
10. particles of radiant energy ___
___ ___ ___ ___
___ ___ ___ ___ ___
11. electromagnetic frequencies to which our eyes are sensitive
___ ___ ___ ___
___ ___
___ ___ ___ ___ ___
12. system of satellites used to determine longitude, latitude, and altitude
___ ___ ___ ___ ___ ___
___
___ ___ ___ ___ ___ ___ ___ ___ ___
___ ___ ___ ___ ___ ___
13. waves used in medical imaging ___ ___ ___
___
14. short radio waves ___ ___ ___ ___ ___ ___
___ ___ ___
15. Part of a television set: __________________ __________________ __________________
Electromagnetic Waves
37
Assessment
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
7. device that can both transmit and receive a radio signal
Name
Date
Class
Chapter Review (continued)
Part B. Concept Review
Directions: Circle the term that best completes the sentence.
1. The unit of radiant energy is the (photon, proton, electron).
2. Television video signals are sent by (frequency, amplitude, video) modulation.
3. The ozone layer protects us from too much (ultraviolet, infrared, microwave) radiation.
4. As the wavelength of an electromagnetic wave decreases, its frequency (increases, decreases,
remains the same).
5. As the frequency of an electromagnetic wave decreases, its energy (increases, decreases,
remains the same).
6. Cell phones use (ultraviolet, infrared, radio) waves to transmit information.
7. Electromagnetic waves carry (force, energy, sound).
8. FM radio wave frequencies are (higher than, lower than, the same as) AM waves.
9. To track a hurricane, meteorologists use (maser, sonar, radar).
10. When gamma rays pass through living tissue, they damage (molecules, electrons, atoms).
Directions: Answer the following question on the lines provided.
Assessment
12. How does a radio signal go from a disc jockey speaking into a microphone at a radio station
to your ear?
38 Electromagnetic Waves
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
11. Each color of visible light has a different (amplitude, intensity, wavelength).
Name
1
Date
Section Focus
Transparency Activity
Class
Rainbows
Transparency Activities
1. Looking at the photo, which color of light bends the most as it
passes through the prism? Which color bends the least?
2. Light is a type of wave. What other kinds of waves can you
think of?
3. What do all these waves have in common? What are some
possible differences?
44 Electromagnetic Waves
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
Have you ever met Roy G. Biv? Roy G. Biv isn’t a person; it’s a common device to help you remember the colors that comprise visible
light. Each letter in Roy G. Biv stands for the first letter of a color—
red, orange, yellow, green, blue, indigo, and violet.
Name
2
Date
Section Focus
Transparency Activity
Class
Whoa, not so fast!
1. Which of the devices in the photo is using electromagnetic waves
to measure speed?
Transparency Activities
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
Radio waves are part of the electromagnetic spectrum. These waves
can do more than just carry a signal to your radio. Here, a radar gun
is being used to measure speed. Radar stands for “radio detecting
and ranging.”
2. Is wave speed or wavelength and frequency more useful for
differentiating among different types of electromagnetic waves?
3. The prefix infra- means below, and the prefix ultra- means
beyond. Knowing this, what do the terms infrared and ultraviolet
mean?
Electromagnetic Waves
45
Name
3
Date
Section Focus
Transparency Activity
Class
Could it be a growth
spurt?
Transparency Activities
1. Name some ways people might use the GPS.
2. Could the GPS function using sound waves? Explain.
46 Electromagnetic Waves
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
The Global Positioning System (GPS) uses electromagnetic waves
and satellites to determine locations and measurements on Earth. For
example, one group of scientists found that Mount Everest is actually
8,850 m (29,035 feet) tall, 2.1 m higher than the figure accepted since
1954. This man is demonstrating another use of the GPS. By connecting a receiver to a computer, he is able to map his location.
X rays
Date
Transparency Activities
Visible light
Gamma rays
Teaching Transparency
Activity
INCREASING FREQUENCY
Microwaves
Infrared waves Ultraviolet waves
2
Radio waves
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
Name
Class
Electromagnetic
Waves
Electromagnetic Waves
47
Name
Teaching Transparency Activity
Date
Class
(continued)
1. Which part of the electromagnetic spectrum can humans detect with their eyes?
2. What two types of electromagnetic waves do microwaves overlap?
3. What type of wave borders visible light at the red end of its range? What type of wave borders
the violet end?
4. In what ways can ultraviolet waves be useful?
5. Which waves are used to inspect luggage at airports?
Transparency Activities
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
6. Which electromagnetic waves have the highest frequency?
48 Electromagnetic Waves
Name
Date
Assessment
Transparency Activity
Class
Electromagnetic
Waves
Directions: Carefully review the table and answer the following questions.
Type of wave
Wavelength range (m)
Gamma rays
1015–1011
X rays
1011–109
Ultraviolet
109–107
Infrared
106–103
Microwave
103–101
Radio wave
101–105
1. Which of the following wavelengths could be broadcast by a rockand-roll radio station?
C 105 meters
A 10–12 meters
B 10–8 meters
D 10–3 meters
2. If a device emits an electromagnetic wave with a wavelength of
10-10 meters, then it is probably___.
F an X-ray machine
G an AM/FM car radio
H a microwave
J a light bulb
Transparency Activities
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
Electromagnetic Waves
3. Food can be heated rapidly in your own home using an
electromagnetic wave with a wavelength of ___.
A 10–13
B 10–9
C 10–2
D 100
Electromagnetic Waves
49