# Astronomy college course/Star cluster quiz
## AstroStarCluster_Study

Template:EduV/quizedit
If you are reading this as a Wikiversity page, proper pagebreaks should result if printed using your browser's print option, usually located in the upper right portion of your screen. But, pagebreaks do not render properly if you use "Printable version" on Wikiversity's Print/export option on the left-hand sidebar. Attribution for the quizzes, and study links are at the end of this document.

### 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

   ##### Attribution (for quiz questions) under CC-by-SA license

    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