QB/AstroStarCluster

-

*_Quizbank_*

Information (click to expand)

#*_Instructions_*

• _Name_* QB/AstroStarCluster
• _Permalink_* Special:Permalink/1388988
• _wiki_* https://en.wikiversity.org/wiki/
• _conceptual_*
• _Attribution_* http://en.wikiversity.org/w/index.php?title=Astronomy_college_course/Star_cluster_quiz&oldid=1388988
• _See_* User:Guy vandegrift

*_Quiz_*

1 A grouping with 100 thousand stars would probably be a

	elliptical galaxy
	dwarf galaxy
	A-B association
	open cluster
	globular cluster

2 Many stars in a typical open cluster are nearly as old as the universe

	True
	False

3 Many stars in a typical globular cluster are nearly as old as the universe

	True
	False

4 The number of globular clusters in the Milky way galaxy is about

	1,500
	150
	15 thousand
	15 million

5 The location of open clusters can be described as

	uniformly distributed in a sphere centered at the Milky Way's center
	in the spiral arms
	between the spiral arms
	uniformly distributed within the galactic disk

6 Stars can "evaporate" from a cluster. What does this mean?

	The gravitational attraction between stars evaporates the gas from stars
	The solar wind from neighboring stars blows the atmosphere away
	Close encounters between 3 or more cluster members gives one star enough speed to leave the cluster

7 A grouping with a hundred stars is probably a

	elliptical galaxy
	dwarf galaxy
	A-B association
	open cluster
	globular cluster

8 I gravity is what holds stars in a cluster together, what is the most important process that causes them to spread apart?

	random motion
	solar wind
	magnetism
	anti-gravity
	supernovae

9 Members of an open cluster feel significant forces only due to gravitational interaction with each other

	True
	False

10 Members of an open cluster feel significant forces from nearby giant molecular clouds

	True
	False

11 Members of a globular cluster tend to be

	young
	old
	of all ages

12 Members of a globular cluster tend to have

	low mass
	high mass
	a wide range of masses

13 In 1917, the astronomer Harlow Shapley was able to estimate the Sun's distance from the galactic centre using

	open clusters
	goblular clusters
	a combination of open and globular clusters

14 Most globular clusters that we see in the sky orbit _____ and have ______ orbits

	the center of the Milky way ... nearly circular
	the center of the Milky way ... elliptic orbits
	within the disk of the Milky way ... nearly circular
	within the disk of the Milky way ... elliptic orbits

*_Instructions_*

Instructions are forthcoming

Transclusion from Quizbank/Instructions_0:
Quizbank/Instructions 0