Astronomy college course/Star cluster quiz

AstroStarCluster_Study
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AstroStarCluster_Study-v1s1
/1/. A grouping with 100 thousand stars would probably be a
 * ___ a) elliptical galaxy


 * ___ b) dwarf galaxy


 * ___ c) globular cluster


 * ___ d) open cluster


 * ___ e) A-B association

/2/. A grouping with a hundred stars is probably a
 * ___ a) elliptical galaxy


 * ___ b) globular cluster


 * ___ c) open cluster


 * ___ d) A-B association


 * ___ e) dwarf galaxy

/3/. I gravity is what holds stars in a cluster together, what is the most important process that causes them to spread apart?
 * ___ a) solar wind


 * ___ b) anti-gravity


 * ___ c) random motion


 * ___ d) supernovae


 * ___ e) magnetism

/4/. Members of an open cluster feel significant forces only due to gravitational interaction with each other
 * ___ a) True


 * ___ b) False

/5/. Members of an open cluster feel significant forces from nearby giant molecular clouds
 * ___ a) True


 * ___ b) False

/6/. Members of a globular cluster tend to be
 * ___ a) young


 * ___ b) old


 * ___ c) of all ages

/7/. Members of a globular cluster tend to have
 * ___ a) high mass


 * ___ b) low mass


 * ___ c) a wide range of masses

/8/. In 1917, the astronomer Harlow Shapley was able to estimate the Sun's distance from the galactic centre using
 * ___ a) open clusters


 * ___ b) a combination of open and globular clusters


 * ___ c) goblular clusters

/9/. Most globular clusters that we see in the sky orbit _____ and have ______ orbits
 * ___ a) the center of the Milky way ... nearly circular


 * ___ b) the center of the Milky way ... elliptic orbits


 * ___ c) within the disk of the Milky way ... nearly circular


 * ___ d) within the disk of the Milky way ... elliptic orbits

/10/. Many stars in a typical open cluster are nearly as old as the universe
 * ___ a) True


 * ___ b) False

/11/. Many stars in a typical globular cluster are nearly as old as the universe
 * ___ a) True


 * ___ b) False

/12/. The number of globular clusters in the Milky way galaxy is about
 * ___ a) 15 million


 * ___ b) 15 thousand


 * ___ c) 1,500


 * ___ d) 150

/13/. The location of open clusters can be described as
 * ___ a) uniformly distributed in a sphere centered at the Milky Way's center


 * ___ b) in the spiral arms


 * ___ c) uniformly distributed within the galactic disk


 * ___ d) between the spiral arms

/14/. Stars can "evaporate" from a cluster. What does this mean?
 * ___ a) The solar wind from neighboring stars blows the atmosphere away


 * ___ b) Close encounters between 3 or more cluster members gives one star enough speed to leave the cluster


 * ___ c) The gravitational attraction between stars evaporates the gas from stars

Key to AstroStarCluster_Study-v1s1
/1/. A grouping with 100 thousand stars would probably be a
 * - a) elliptical galaxy


 * - b) dwarf galaxy


 * + c) globular cluster


 * - d) open cluster


 * - e) A-B association

/2/. A grouping with a hundred stars is probably a
 * - a) elliptical galaxy


 * - b) globular cluster


 * + c) open cluster


 * - d) A-B association


 * - e) dwarf galaxy

/3/. I gravity is what holds stars in a cluster together, what is the most important process that causes them to spread apart?
 * - a) solar wind


 * - b) anti-gravity


 * + c) random motion


 * - d) supernovae


 * - e) magnetism

/4/. Members of an open cluster feel significant forces only due to gravitational interaction with each other
 * - a) True


 * + b) False

/5/. Members of an open cluster feel significant forces from nearby giant molecular clouds
 * + a) True


 * - b) False

/6/. Members of a globular cluster tend to be
 * - a) young


 * + b) old


 * - c) of all ages

/7/. Members of a globular cluster tend to have
 * - a) high mass


 * + b) low mass


 * - c) a wide range of masses

/8/. In 1917, the astronomer Harlow Shapley was able to estimate the Sun's distance from the galactic centre using
 * - a) open clusters


 * - b) a combination of open and globular clusters


 * + c) goblular clusters

/9/. Most globular clusters that we see in the sky orbit _____ and have ______ orbits
 * - a) the center of the Milky way ... nearly circular


 * + b) the center of the Milky way ... elliptic orbits


 * - c) within the disk of the Milky way ... nearly circular


 * - d) within the disk of the Milky way ... elliptic orbits

/10/. Many stars in a typical open cluster are nearly as old as the universe
 * - a) True


 * + b) False

/11/. Many stars in a typical globular cluster are nearly as old as the universe
 * + a) True


 * - b) False

/12/. The number of globular clusters in the Milky way galaxy is about
 * - a) 15 million


 * - b) 15 thousand


 * - c) 1,500


 * + d) 150

/13/. The location of open clusters can be described as
 * - a) uniformly distributed in a sphere centered at the Milky Way's center


 * + b) in the spiral arms


 * - c) uniformly distributed within the galactic disk


 * - d) between the spiral arms

/14/. Stars can "evaporate" from a cluster. What does this mean?
 * - a) The solar wind from neighboring stars blows the atmosphere away


 * + b) Close encounters between 3 or more cluster members gives one star enough speed to leave the cluster


 * - c) The gravitational attraction between stars evaporates the gas from stars


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 * http://en.wikiversity.org/w/index.php?title=Astronomy_college_course/Star_cluster_quiz&oldid=1388988
 * Study guide
 * http://en.wikipedia.org/w/index.php?title=Star_cluster&oldid=662839103