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