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Electromagnetic Waves 8th Grade
Contributed by: Peterson
  • 1. Global Positioning System signals can tell you
A) what television station you are tuned to
B) how many satellites are in orbit
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) electromagnetic waves
B) longitudinal waves
C) mechanical waves
D) transverse waves
  • 3. Electromagnetic waves can transfer energy without a(n)
A) magnetic field
B) electric field
C) change in either a magnetic or an electric field
D) medium
  • 4. The range of electromagnetic waves placed in a certain order is called the
A) electromagnetic wavelength
B) electromagnetic spectrum
C) electromagnetic frequency
D) electromagnetic field
  • 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 speed of the wave
B) the loudness 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 music
D) the speech
  • 8. Which electromagnetic waves have the longest wavelengths and lowest frequencies?
A) infrared waves
B) radio waves
C) gamma rays
D) ultraviolet 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) thermogram
B) X-ray picture
C) spectrum
D) MRI
  • 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) X-rays
B) magnetic resonance images
C) ultraviolet images
D) thermograms
  • 13. In the phenomenon known as the _________, electric current will flow when light shines on certain substances.
A) electromagnetism
B) electromagnetic spectrum
C) photoelectric effect
D) electricity
  • 14. Which letter shows the type of wave that can be seen by the human eye?
A) A
B) D
C) C
D) B
  • 15. What is the name of the type of wave labeled C?
A) radar
B) ultraviolet rays
C) visible light
D) infrared rays
  • 16. Which letter indicates X-rays?
A) A
B) C
C) B
D) D
  • 17. What type of wave that has the highest frequency?
A) gamma rays
B) microwave
C) infrared rays
D) x-rays
  • 18. What type of wave that has the the greatest energy?
A) gamma rays
B) x-rays
C) infrared rays
D) microwave
  • 19. What type of wave is labeled A?
A) infrared
B) radio
C) ultraviolet
D) visible light
  • 20. What is the object labeled as A?
A) ground transmitter
B) radio waves
C) ground receiver
D) communications satellite
  • 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) ground transmitter
C) communications satellite
D) radio waves
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