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Astronomy Exam 2 Part 2

10 Questions
Astronomy Quizzes & Trivia

Astronmy exam part 2. Taken from Astron 100 class.

Questions and Answers
  • 1. 
    Which of the following nuclear fuels does an one solar mass star use over the course of its entire evolution?
    • A. 

      A. hydrogen and helium

    • B. 

      B. hydrogen

    • C. 

      C. hydrogen, helium and carbon

    • D. 

      D. hydrogen, helium, carbon, and neon

    • E. 

      E. hydrogen, helium, carbon, neon, and oxygen

  • 2. 
    The most important characteristic of a star for determining its lifetime is its
    • A. 

      A. temperature

    • B. 

      B. color

    • C. 

      C. distance from the main sequence

    • D. 

      D. radius

    • E. 

      E. mass

  • 3. 
    Which element from the following list does not liberate energy when ”burned” via nuclear fusion in the center of a star?
    • A. 

      A. helium

    • B. 

      B. carbon.

    • C. 

      C. iron.

    • D. 

      D. silicon.

    • E. 

      E. neon.

  • 4. 
    A neutron star is expected to spin rapidly because
    • A. 

      A. it has high orbital velocities.

    • B. 

      B. it has high densities.

    • C. 

      C. it has high temperatures.

    • D. 

      D. it conserved angular momentum when it collapsed.

    • E. 

      E. the energy from the supernova explosion that formed them made them spin faster.

  • 5. 
    Which of the following is true of pulsars?
    • A. 

      A. They have very strong magnetic fields.

    • B. 

      B. They rotate very rapidly.

    • C. 

      C. They are neutron stars.

    • D. 

      D. They have a density approximately equal to the density of an atomic nucleus.

    • E. 

      E. All of the above are true.

  • 6. 
    A white dwarf is supported against collapse by
    • A. 

      A. neutron drip.

    • B. 

      B. neutrino pressure.

    • C. 

      C. electron degeneracy pressure.

    • D. 

      D. neutron degeneracy pressure.

    • E. 

      E. a central black hole.

  • 7. 
    In a supernova explosion
    • A. 

      A. the star may shine as brightly as billions of stars.

    • B. 

      B. elements heavier than iron are formed.

    • C. 

      C. material that later formed the Earth and us humans was distributed between the stars

    • D. 

      D. matter is ejected at tens of thousands of kilometers per second.

    • E. 

      E. All of the above.

  • 8. 
    Which of the following stars is most dense?
    • A. 

      A. a supergiant star

    • B. 

      B. a white dwarf

    • C. 

      C. a main sequence star

    • D. 

      D. a giant star

    • E. 

      E. the sun

  • 9. 
    If two stars have the same spectral type, then they must have approximately the same
    • A. 

      A. mass.

    • B. 

      B. parallactic distance.

    • C. 

      C. surface temperature.

    • D. 

      D. chemical composition.

    • E. 

      E. luminosity.

  • 10. 
    Which of the following can escape from inside the event horizon of a black hole?
    • A. 

      A. particles of matter.

    • B. 

      B. particles of antimatter.

    • C. 

      C. visible light.

    • D. 

      D. X-rays.

    • E. 

      E. None of the above.