Astronomy Exams.

49 Questions  I  By Csulb_furreal
Please take the quiz to rate it.

 Astronomy Exams.
Astronomy quiz

  
Changes are done, please start the quiz.


Questions and Answers

Removing question excerpt is a premium feature

Upgrade and get a lot more done!
  • 1. 
    If the theory that novae occur in close binary systems is correct, then novae should
    • A. 

      Not occur in old star clusters

    • B. 

      Repeat after some interval

    • C. 

      All be visual binaries

    • D. 

      Occur in regions of star formation


  • 2. 
    What are small bodies in the solar system which travel about the Sun in highly eccentric orbits?
    • A. 

      Meteors

    • B. 

      Meteorites

    • C. 

      Planetesimals

    • D. 

      Comets


  • 3. 
    What is a planetary nebula?
    • A. 

      The ejected envelope of a giant star surrounding the remains of a star

    • B. 

      A planet surrounded by a glowing shell of gas

    • C. 

      A type of young, medium-mass star

    • D. 

      The disk of gas and dust surrounding a young star that will soon form a star system


  • 4. 
    The Oot Cloud is believed to be
    • A. 

      A spherical cloud of cometary nuclei far beyond the Kuiper Belt

    • B. 

      The gerat nebula found just below the belt stars of Orion.

    • C. 

      A grouping of asteroids and meteoroids between the orbits of Mars and Jupiter

    • D. 

      The circular disk of gas around the Sun's equator from which the planets formed

    • E. 

      A flattened belt of cometary nuclei just beyond the orbit of Neptune


  • 5. 
    The large planetesimals would have grown faster than the smaller planetesimals because
    • A. 

      They were moving faster in their orbits than the smaller planetesimals

    • B. 

      Their stronger gravity would pull in more material

    • C. 

      There was more material located near them that could be accreted

    • D. 

      The smaller planetesimals were covered by a layer of material that was lost during collisions

    • E. 

      All of the above


  • 6. 
    When the core of a star shrinks after hydrogen fusion stops,
    • A. 

      The core heats and the star expands

    • B. 

      The core cools and the star contracts

    • C. 

      The core heats and the star contracts

    • D. 

      The core cools and the star expands


  • 7. 
    Which one supports the solar nebula theory of the origin of the solar system?
    • A. 

      Disks are common around young stars.

    • B. 

      Planets are round.

    • C. 

      The sun is the least massive object in the solar system.

    • D. 

      Disks are rare around young stars.


  • 8. 
    Most planets thus far discovered around other stars were found by
    • A. 

      The planet blotting out the light of the star.

    • B. 

      Seeing the planets next to the star.

    • C. 

      Traveling to the star.

    • D. 

      Varying Doppler shifts of the stars.


  • 9. 
    The lowest mass object that can initiate thermonuclear fusion of hydrogen has a mass of about
    • A. 

      60 solar mass

    • B. 

      1 solar mass

    • C. 

      0.08 solar mass

    • D. 

      0.001 solar mass

    • E. 

      0.5 solar mass


  • 10. 
    What produces a type-I supernova?
    • A. 

      Mass transfer to a white dwarf

    • B. 

      The radiactive decay of cobalt into iron

    • C. 

      A large nova

    • D. 

      The collapse of the core of a massive star


  • 11. 
    A surface explosion on a white dwarf,caused by falling matter from the atmosphere of its binary companion,creates what kind of object?
    • A. 

      Type-I supernova

    • B. 

      Planetary nebula

    • C. 

      Nova

    • D. 

      Type-II supernova


  • 12. 
    All Jovian planets have
    • A. 

      Strong magnetic fields

    • B. 

      Many satellites

    • C. 

      Rings

    • D. 

      All of these

    • E. 

      None of these


  • 13. 
    Which planet by itself contains the majority of mass of all the planets?
    • A. 

      Saturn

    • B. 

      Uranus

    • C. 

      Venus

    • D. 

      Jupiter

    • E. 

      The Earth


  • 14. 
    A star is considered to begin its main sequence life when
    • A. 

      It starts to collapse.

    • B. 

      Its protostar life begins.

    • C. 

      It begins to move off the main sequence.

    • D. 

      Nuclear reactions start.


  • 15. 
    A brown dwarf is
    • A. 

      A warm starlike object that has too little mass to suppor fusion in its core.

    • B. 

      A stage of a star 's life after the white dwarf stage.

    • C. 

      The final fate of stars like the Sun, but not less massive stars.

    • D. 

      A stage of a star' s life prior to the white dwarf stage.

    • E. 

      The final fate of all stars.


  • 16. 
    Conservation of angular momentum states that as a cloud of interstellar gas and dust collapses,the velocity of the particles increases.
    • A. 

      False

    • B. 

      True


  • 17. 
    Comets and asteroids are
    • A. 

      Other names for moons of the planets

    • B. 

      Material left over from the formation of the planets

    • C. 

      All more massive than Earth's moon

    • D. 

      Primarily located within 1 AU of the Sun


  • 18. 
    The Helix and Ring nebulae are
    • A. 

      Supernova remnants

    • B. 

      Planetary nebulae

    • C. 

      The result of carbon detonation

    • D. 

      Nebulae associated with Herbig-Haro objects


  • 19. 
    Which of the following are the Jovian planets?
    • A. 

      Jupiter, Saturn, Uranus, and Neptune only

    • B. 

      Everything past Mars and the asteroid belt

    • C. 

      Jupiter, Saturn, Uranus, Neptune, and Pluto

    • D. 

      Only Jupiter

    • E. 

      Only Jupiter and Saturn


  • 20. 
    What event leads to the formation of a red giant?
    • A. 

      A contracting core of helium

    • B. 

      Hydrogen shell burning

    • C. 

      Expanding outer layers

    • D. 

      All of the above

    • E. 

      None of the above


  • 21. 
    The Sun will at some time in the future become
    • A. 

      A red giant

    • B. 

      A white dwarf

    • C. 

      Both of the above

    • D. 

      None of them


  • 22. 
    Degenerate refers to a state of matter at
    • A. 

      High density

    • B. 

      High temperature

    • C. 

      High luminosity

    • D. 

      High mass


  • 23. 
    Which of the following is not a characteristic of the terrestrial planets?
    • A. 

      Craters in old surfaces

    • B. 

      Orbits inside the asteroids

    • C. 

      Very few satellites

    • D. 

      Low average density

    • E. 

      Small diameters


  • 24. 
    Neutron stars have ____________ magnetic fields.
    • A. 

      Non-existent

    • B. 

      Weak

    • C. 

      Enormous

    • D. 

      Single pole


  • 25. 
    If galaxy A is four times more distant than galaxy B, then according to the Hubble Law, galaxy A will recede __________ than galaxy B.
    • A. 

      4 times faster

    • B. 

      16 times faster

    • C. 

      2 times faster

    • D. 

      1.2 times faster

    • E. 

      0.25 times faster


  • 26. 
    The collapse of the core of a high-mass star at the end of its life lasts approximately
    • A. 

      One second

    • B. 

      One hour

    • C. 

      One year

    • D. 

      One week


  • 27. 
    If we lived on a galaxy one billion light-years from our own, what would we see?
    • A. 

      A universe 1 billion years younger than ours.

    • B. 

      Nothing - there are no galaxies one billion light-years away from us.

    • C. 

      Much the same universe we see today.

    • D. 

      A universe 1 billion years older than ours.


  • 28. 
    What is Cygnus X-1?
    • A. 

      The first discovered X-ray burster

    • B. 

      A millisecond pulsar with two planets

    • C. 

      A leading candidate for being a black hole

    • D. 

      A binary neutron star system

    • E. 

      An experimental spacecraft designed to travel close to the speed of light


  • 29. 
    A Cepheid star varies in luminosity because
    • A. 

      The star rotates too quickly

    • B. 

      The entire star pulsates from its core to its surface

    • C. 

      The star is too massive to be stable

    • D. 

      The outer envelope of the star pulsates


  • 30. 
    Open clusters contain mostly
    • A. 

      The oldest stars in the galaxy

    • B. 

      Red giants

    • C. 

      Main sequence stars

    • D. 

      White dwarfs


  • 31. 
    Hubble's constant H0 , represents
    • A. 

      The time it takes a galaxy to move twice as far away from us

    • B. 

      The speed at which galaxies are moving away from us

    • C. 

      The size of the universe

    • D. 

      The rate of expansion of the universe


  • 32. 
    Which of the following is inferred by Hubble's law?
    • A. 

      The larger the red shift of the galaxy, the more distance it is

    • B. 

      The greater the distance, the fainter the galaxy is in reality

    • C. 

      The greater the distance, the more luminous the galaxy

    • D. 

      The more distance a galaxy, the more evolved its member stars will be


  • 33. 
    What temperature does COBE find the Big Bang has cooled to by now?
    • A. 

      2.73 K

    • B. 

      5,800 K

    • C. 

      About 3,000 K

    • D. 

      About 300 K

    • E. 

      273 K


  • 34. 
    The density of a _________ is greater than the density of a ___________.
    • A. 

      White dwarf, neutron star

    • B. 

      White dwarf, black hole

    • C. 

      Pulsar, neutron star

    • D. 

      Neutron star, black hole

    • E. 

      Pulsar, white dwarf


  • 35. 
    Homogeneity and isotropy, taken as assumptions regarding the structure and evolution of the universe, are known as
    • A. 

      Olbers'Paradox

    • B. 

      General Theory of Relativity

    • C. 

      Doppler Effect

    • D. 

      Grand Unified Theory

    • E. 

      Cosmological principle


  • 36. 
    What characteristic of a star cluster is used to determine its age?
    • A. 

      Chemical composition of stars in the cluster

    • B. 

      Total number of stars in the cluster

    • C. 

      Luminosity of the faintest stars in the cluster

    • D. 

      Color of the main sequence turnoff in the cluster


  • 37. 
    Black holes that are stellar remnants can be found by searching for
    • A. 

      Dark regions at the centers of galaxies

    • B. 

      Objects that emit very faint radio emission

    • C. 

      Extremely luminous infrared objects

    • D. 

      Variable X-ray sources


  • 38. 
    Measured ages of globular clusters and a study of the time required for massive stars to build up the present abundance of heavy elements suggests that the universe is
    • A. 

      At least 13 billion years old.

    • B. 

      Closed.

    • C. 

      No more than 9 billion years old.

    • D. 

      Flat.

    • E. 

      At least 20 billion years old.


  • 39. 
    Because almost all galaxies show redshifted spectra,we know that
    • A. 

      Nobody likes us

    • B. 

      We must be at the center of the universe

    • C. 

      The universe is expanding

    • D. 

      The sky must be dark at night

    • E. 

      All of the above are correct


  • 40. 
    The event horizon of a black hole is defined as
    • A. 

      The radius of the original neutron star before it became a black hole

    • B. 

      The point of maximum gravity

    • C. 

      The point at which shock waves emanate from the strong gravitational distortion the black hole creates in the fabric of spacetime

    • D. 

      The radius at which the escape speed equals the speed of light


  • 41. 
    In A.D. 1054,Chinese astronomers observed the appearance of a new star,whose location is now occupied by
    • A. 

      A supernova remnant.

    • B. 

      A white dwarf.

    • C. 

      A planetary nebulae.

    • D. 

      A young massive star.

    • E. 

      A globular cluster.


  • 42. 
    ________ is the result of mass distorting the fabric of spacetime.
    • A. 

      Gravity

    • B. 

      Energy

    • C. 

      Radiation

    • D. 

      Fusion


  • 43. 
    Essentially all the elements heavier than iron in our galaxy were formed
    • A. 

      By fusion in the cores of the most massive main-sequence stars

    • B. 

      By supernovae

    • C. 

      During the formation of black holes

    • D. 

      During the formation of planetary nebulae


  • 44. 
    We can identify only a small fraction of all the pulsars that exist in our galaxy because
    • A. 

      Few swing their beam of synchrotron emission in our direction

    • B. 

      Most have evolved to become black holes,which emit no light

    • C. 

      Massive stars are very rare

    • D. 

      Gas and dust efficiently block radio photons


  • 45. 
    Neutron stars do not have:
    • A. 

      Large rotation periods

    • B. 

      Strong magnetic fields

    • C. 

      Much mass compared to the Sun


  • 46. 
    One outstanding feature of globular clusters is their lack of ________ main sequence stars
    • A. 

      Low mass

    • B. 

      Lower

    • C. 

      Old

    • D. 

      Upper


  • 47. 
    If the Earth were to be condensed down in size until it became a black hole,its Schwarzschild radius would be
    • A. 

      1 km

    • B. 

      1 cm

    • C. 

      1m

    • D. 

      10 km


  • 48. 
    Neutron stars have masses that range from
    • A. 

      2.5 solar mass to 10 solar mass

    • B. 

      3.5 solar mass to 25 solar mass

    • C. 

      1.2 solar mass to 30 solar mass

    • D. 

      1.4 solar to 3 solar mass


  • 49. 
    As a high-mass main-sequence star evolves off the main sequence,it follows a _______ on the HR diagram
    • A. 

      Nearly vertical path

    • B. 

      Path of constant radius

    • C. 

      Roughly horizontal path

    • D. 

      None of the above answers is correct


Back to top

Removing ad is a premium feature

Upgrade and get a lot more done!
Take Another Quiz
We have sent an email with your new password.