Quiz: Are You Ready To Take The Astronomy Exam Test?

9 Questions | Total Attempts: 654

SettingsSettingsSettings
Please wait...
Quiz: Are You Ready To Take The Astronomy Exam Test?

.


Questions and Answers
  • 1. 
    Most of the light we see coming from the sun originates in the
    • A. 

      Photosphere

    • B. 

      Chromosphere

    • C. 

      Corona

    • D. 

      Sunspots

    • E. 

      Magnetic field

  • 2. 
    The two most abundant elements in the sun are
    • A. 

      Nitrogen and oxygen.

    • B. 

      Hydrogen and helium

    • C. 

      Sulfur and iron.

    • D. 

      Carbon and hydrogen.

    • E. 

      Carbon and nitrogen

  • 3. 
    Sunspots are dark because
    • A. 

      They are at a lower temperature than the surrounding regions.

    • B. 

      They contain so much heavy material that light can’t readily escape

    • C. 

      Magnetic fields bring up iron from the core which blocks the light

    • D. 

      Locally heavy solar winds blow out the solar flame.

    • E. 

      They are so hot that they emit most of their energy in gamma rays.

  • 4. 
    The fusion of four hydrogen nuclei into a helium nucleus releases energy because
    • A. 

      Fusion only occurs at high temperatures.

    • B. 

      A helium nucleus has two protons, hydrogen only has one.

    • C. 

      Fusion can only occur at the centers of stars.

    • D. 

      Helium is made of antimatter.

    • E. 

      A helium nucleus weighs less than four hydrogen nuclei.

  • 5. 
    A star’s apparent brightness depends only on the star’s  
    • A. 

      Temperature and distance.

    • B. 

      Distance.

    • C. 

      Distance and luminosity

    • D. 

      Temperature and diameter.

    • E. 

      Absolute magnitude.

  • 6. 
    If a star is half as hot as our Sun, but has the same luminosity, how large is its radius compared to the Sun?
    • A. 

      1/2 x as large

    • B. 

      1/4 x as large

    • C. 

      2x larger

    • D. 

      4x larger

    • E. 

      The same

  • 7. 
    Parallax would be easier to measure if
    • A. 

      The stars were further away.

    • B. 

      Earth moved backward along its orbit.

    • C. 

      Earth’s orbit was larger.

    • D. 

      All of these

    • E. 

      None of these

  • 8. 
    Main Sequence stars all share the same property of
    • A. 

      Having the same mass.

    • B. 

      Having the same luminosity.

    • C. 

      Possessing iron cores.

    • D. 

      Being composed of neutrinos.

    • E. 

      Fusing H to He in their cores.

  • 9. 
    In main-sequence stars the gravitational force which tends to compress a star is counterbalanced by
    • A. 

      Rapid rotation.

    • B. 

      Electrical force in the atom.

    • C. 

      Magnetic force.

    • D. 

      Thermal gas pressure.

    • E. 

      Nuclear force.