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