Practice Questions for the Sun and the Stars

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Practice Questions for the Sun and the Stars
2015-05-04 16:40:47
Practice Questions Sun Stars
final exam
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  1. Practice Questions for the Sun and the Stars
    helium, energy, and neutrinos.
  2. What do we mean when we say that the Sun is in gravitational equilibrium?
    There is a balance within the Sun between the outward push of pressure and the inward pull of gravity.
  3. Which of the following is the best answer to the question, "Why does the Sun shine?"
    As the Sun was forming, gravitational contraction increased the Sun's temperature until the core became hot enough for nuclear fusion, which ever since has generated the heat that makes the Sun shine.
  4. The Sun will exhaust its nuclear fuel in about
    5 billion years
  5. From center outward, which of the following lists the "layers" of the Sun in the correct order?
    core, radiation zone, convection zone, photosphere, chromosphere, corona
  6. According to modern science, approximately how old is the Sun?
    4.5 billion years
  7. What do sunspots, solar prominences, and solar flares all have in common?
    They are all strongly influenced by magnetic fields on the Sun.