Jump to content

Astronomy college course/Star cluster quiz

From Wikiversity

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