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