Astronomy Midterm Study Guide

20 Questions | Total Attempts: 65

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Astronomy Midterm Study Guide - Quiz

If you are looking for a way to study for your midterm exams then the quiz below is designed to help you do just that as it covered all the topics we have done so far. Give it a shot and see how ready you are to tackle it. All the best!


Questions and Answers
  • 1. 
    A white dwarf will be______________compared to a red dwarf that has the same luminosity.
    • A. 

      Hotter and larger

    • B. 

      Hotter and smaller

    • C. 

      Cooler and larger

    • D. 

      Cooler and smaller

  • 2. 
    Achernar is a star located 36.2 parsecs away from Earth, and has an apparent magnitude of m= +0.51. If Achernar were relocated to 10 parsecs away from Earth, its apparent magnitude would:
    • A. 

      Get brighter

    • B. 

      Get dimmer

    • C. 

      Stay the same

    • D. 

      Not enough information

  • 3. 
    Ross 154 is a star located 4.08 parsecs away from Earth, and has an apparent magnitude of m= +13.3. If Ross 154 were relocated to 10 parsecs away from Earth, its apparent magnitude would:
    • A. 

      Stay the same

    • B. 

      Get brighter

    • C. 

      Get dimmer

    • D. 

      Not enough information

  • 4. 
    A main sequence star will be___________________compared to a giant star that has the same temperature.
    • A. 

      Less luminous and smaller

    • B. 

      More luminous and larger

    • C. 

      Less luminous and larger

    • D. 

      More luminous and smaller

  • 5. 
    Consider Earth and Venus in their orbit as shown below. (This drawing is not to scale, and orbits have been simplified as circles instead of ellipses.) The position of Venus in the San Luis Obispo, CA sky at sunset (6:00 PM) will be:
    • A. 

      Not enough information

    • B. 

      High over the east horizon

    • C. 

      Low over the west horizon

    • D. 

      Over the southwest sunrise

  • 6. 
    Which phase will the moon be in if it is setting at 3:00 AM? Clearly circle your answer below.
    • A. 

      MoonA

    • B. 

      MoonB

    • C. 

      MoonC

    • D. 

      MoonE

  • 7. 
    Why does a total lunar eclipse not occur every time the moon is full?
    • A. 

      The moon would tilt towards the sun.

    • B. 

      The orbit of the moon around earth would be equal

    • C. 

      The orbit of the moon around Earth is tilted with respect to the orbit of Earth around the sun.

    • D. 

      Not enough information

  • 8. 
    Why are some solar eclipses angular rather than total?
    • A. 

      The orbit of the moon is tilted

    • B. 

      The orbit of the moon, not a perfect circle but is an eclipse.

    • C. 

      The eclipses are never tilted

    • D. 

      All eclipses are angular due to the gravitational pull of Earth

  • 9. 
    The ages of globular cluster stars in the Milky Way halo are determined from:
    • A. 

      The tilt of the Earths orbit

    • B. 

      The turn-off point on an H-R diagram

    • C. 

      The gravitational pull of Jupiter

    • D. 

      The size and density of the Milky Way

  • 10. 
    The massive stars left on the main sequence line on an H-R diagram gives the age of the star cluster, because all the stars started their formation at the same time, and the more massive stars have shorter lifetimes (and leave the main sequence line faster) than the less massive star. Response (A) would determine the distance to the stars; response (C) would give and indication of their densities/luminosity class; response (D) would be correlated with the surface temperatures of these stars. As seen from the Milky Way, a distant galaxy will:
    • A. 

      Shrink to a white dwarf

    • B. 

      Grow to a red giant

    • C. 

      Appear as it will in the future

    • D. 

      Appear as it did in its past.

  • 11. 
    The H-R diagrams of three possible or impossible star clusters are shown below. Star cluster H-R diagram(s) is/are possible? (Do not circle the H-R diagrams; clearly circle one response below)
    • A. 

      One (Star clusters Z)

    • B. 

      Two (Star clusters X and Y)

    • C. 

      One (Star clusters Y)

    • D. 

      Two (Star clusters X and Z)

  • 12. 
    The H-R diagrams of three star clusters are shown below. Which star cluster is the youngest? (Do not circle the H-R diagrams; clearly circle one response below)
    • A. 

      Star cluster X

    • B. 

      Star cluster Y

    • C. 

      Star cluster Z

    • D. 

      Not enough information

  • 13. 
    Which star cluster is the oldest? (Do not circle the H-R diagrams; clearly circle one response below)
    • A. 

      Star cluster X

    • B. 

      Star cluster Y

    • C. 

      Star cluster Z

    • D. 

      Not enough information

  • 14. 
    ___________will be found in an extremely young star cluster.
    • A. 

      White dwarfs

    • B. 

      Yellow super giants

    • C. 

      Red giants

    • D. 

      Blue-hot main sequence stars.

  • 15. 
    If the Sun rises in the southeast horizon, as seen by an observer in San Luis Obispo, CA, how many hours will there be before the Sun sets on that day?
    • A. 

      Less than 12 hours.

    • B. 

      Less than 11 hours

    • C. 

      More than 4 hours

    • D. 

      Not enough information

  • 16. 
    In which list are celestial features correctly shown in order of increasing size?
    • A. 

      Solar system, galaxy, universe, plantes

    • B. 

      Planets, solar system, universe, galaxy

    • C. 

      Planet, solar system, galaxy, universe

    • D. 

      Universe, galaxy, solar system, planets

  • 17. 
    The diagram below shows Earth, the Moon, and the Sun’s rays as viewed from space. For observers on Earth, which phase of the Moon is represented by the diagram?
    • A. 

      1

    • B. 

      3

    • C. 

      2

    • D. 

      5

  • 18. 
    The Sun classified as a
    • A. 

      A star

    • B. 

      Main sequence star with a temperature of approximately 6,000iC and a luminosity of 1

    • C. 

      Main sequence star with a temperature of approximately 6,000iC and a luminosity of 5

    • D. 

      Not enough information

  • 19. 
    Stars are believed to undergo evolutionary changes over millions of years. The flowchart below shows stages of predicted changes in the Sun. According to this flowchart, the Sun will become
    • A. 

      Hotter and brighter in stage 2, then cooler and dimmer in stage 3

    • B. 

      Cooler and smaller in stage 2, then hotter and brighter in stage 3

    • C. 

      Smaller and brighter in stage 2, then hotter and brighter in stage 3

    • D. 

      Smaller and dimmer in stage 2, then cooler and brighter in stage 3

  • 20. 
    The diagram below shows Earth as viewed from above the North Pole (NP). Points A and B are locations on Earths surface. At location A, the time is 12 noon, What is the time at location B?
    • A. 

      6am

    • B. 

      8am

    • C. 

      10pm

    • D. 

      3am

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