Chapter 22

  1. The source of the sun's energy is the result of
    nuclear fusion
  2. How long does it take light from the sun to reach the Earth?
    8 min
  3. The most explosive events to occur on the Sun are ______.
    solar flares
  4. The sun has enough fuel to last how many more years?
    5 billion years
  5. Why would the moon make an good site for an observatory?
    no atmoshphere
  6. Which of the following colors has the longest wavelength
  7. Granules are located on this layer
  8. Which part of the electromagnetic spectrum is detected as heat?
    infra red
  9. In order to have a nuclear fusion produced in the core of the sun there must be
    very high pressure and very high temperature
  10. The spectra of most stars are of this type
    dark line (absorption) spectrum
  11. The sun produces energy by converting ____________
    hydrogen nuclei to helium nuclei
  12. To determine whether a celstrial body is approaching or receding from Earth, astronomers employ _________________
    the Doppler principle
  13. The southern lights are known as the
    aurora australis
  14. What layer of the Earth's atmosphere that produces auroras?
  15. As an object approaches the Earth the spectra shifts toward the ____ end of the spectra.
  16. How did Galileo prove the sun rotated?
    movement of sunspots
  17. Which layer of the sun is visible only during a total solar eclipse?
  18. Auroras are an effect caused by
    solar flares
  19. What fuel is being consumed during nuclear fusion?
  20. We know that the area surrounding a sunspot is hotter than the sunspot
    the sunspot is darker than the surrounding area
  21. _________ are great arches of hot gas streaming between sunspots.
Card Set
Chapter 22
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