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Electromagnetic Waves 8th Grade
Contributed by: Peterson
  • 1. Global Positioning System signals can tell you
A) how many satellites are in orbit
B) what television station you are tuned to
C) your exact location on Earth
D) who is sending a message to your cellphone
  • 2. Which waves have some electrical properties and some magnetic properties?
A) longitudinal waves
B) electromagnetic waves
C) transverse waves
D) mechanical waves
  • 3. Electromagnetic waves can transfer energy without a(n)
A) electric field
B) magnetic field
C) medium
D) change in either a magnetic or an electric field
  • 4. The range of electromagnetic waves placed in a certain order is called the
A) electromagnetic field
B) electromagnetic wavelength
C) electromagnetic frequency
D) electromagnetic spectrum
  • 5. Which model of light helps explain the photoelectric effect?
A) the electromagnetic model
B) the polarizing model
C) the wave model
D) the particle model
  • 6. FM signals travel as changes in
A) the loudness of the wave
B) the speed of the wave
C) the frequency of the wave
D) the amplitude of the wave
  • 7. On AM broadcasts, what remains constant?
A) the amplitude
B) the frequency
C) the speech
D) the music
  • 8. Which electromagnetic waves have the longest wavelengths and lowest frequencies?
A) infrared waves
B) gamma rays
C) radio waves
D) ultraviolet waves
  • 9. Light that has passed through a polarizing filter is called
A) white light
B) polarized light
C) photoelectric light
D) transverse light
  • 10. Visible light can be separated into various colors to form a(n)
A) X-ray picture
B) MRI
C) thermogram
D) spectrum
  • 11. What kind of waves do cellular telephones use to transmit and receive signals?
A) microwaves
B) gamma rays
C) ultraviolet rays
D) infrared rays
  • 12. The images made by an infrared camera are called
A) ultraviolet images
B) thermograms
C) magnetic resonance images
D) X-rays
  • 13. In the phenomenon known as the _________, electric current will flow when light shines on certain substances.
A) electromagnetic spectrum
B) electromagnetism
C) photoelectric effect
D) electricity
  • 14. Which letter shows the type of wave that can be seen by the human eye?
A) D
B) A
C) B
D) C
  • 15. What is the name of the type of wave labeled C?
A) ultraviolet rays
B) visible light
C) infrared rays
D) radar
  • 16. Which letter indicates X-rays?
A) D
B) B
C) A
D) C
  • 17. What type of wave that has the highest frequency?
A) infrared rays
B) x-rays
C) gamma rays
D) microwave
  • 18. What type of wave that has the the greatest energy?
A) microwave
B) infrared rays
C) gamma rays
D) x-rays
  • 19. What type of wave is labeled A?
A) ultraviolet
B) radio
C) infrared
D) visible light
  • 20. What is the object labeled as A?
A) communications satellite
B) radio waves
C) ground receiver
D) ground transmitter
  • 21. What is the object labeled B?
A) communications satellite
B) ground receiver
C) radio waves
D) ground transmitter
  • 22. What is the object labeled C?
A) communications satellite
B) ground transmitter
C) radio waves
D) ground receiver
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