Quiz: Take The Astronomy Exams Test!

49 Questions | Total Attempts: 970

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Quiz: Take The Astronomy Exams Test!

There are trillion galaxies in the universe that no one quite exactly knows how many there are. For you to ensure you understand concepts you have learned and are ready to tackle the astronomy exam, you need to do proper revision. The quiz will do that for you. Give it a shot!


Questions and Answers
  • 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. 
    • 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. 
    • 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. 
    • 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. 
    • 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. 

      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. 
    • 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. 
    • 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