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