01
Choose one
1 point
Which description best identifies a lenticular galaxy?
Free Practice Quiz Question List
3 Galaxies and Their Evolution Online Quiz Questions
Use this free practice quiz with 20 questions to review 3 Galaxies and Their Evolution, test your knowledge, and prepare for your next test or exam.
20 questions
02
Written response
1 point
What is the name of the extended structure beyond a galaxy’s visible stars whose gravity affects how stars and gas move?
03
Fill in the blank
1 point
Cold gas can under gravity to form stars.
04
True or false
1 point
True or false: The common galaxy shape categories describe patterns, but every galaxy follows a fixed sequence from spiral to elliptical.
- A
True
- B
False
05
Choose one
1 point
A galaxy’s available star-forming gas is used up, heated, or removed. What can happen to its rate of star formation?
- A
Star formation must increase because the galaxy has less gas to cool.
- B
The galaxy must immediately become elliptical.
- C
Star formation can slow or stop.
- D
The galaxy's stars begin colliding with one another.
06
True or false
1 point
True or false: During a galaxy merger, the stars from the two galaxies usually collide directly.
- A
True
- B
False
07
Written response
1 point
What term is sometimes used for a large galaxy gradually absorbing smaller companion galaxies?
08
Choose one
1 point
What is one way a bar can influence the evolution of a galaxy?
- A
They can redistribute gas and stars within the galaxy.
- B
They prevent all gas from moving toward the center.
- C
They turn the galaxy into a cluster.
- D
They cause dark matter to emit visible light.
09
Fill in the blank
1 point
The large-scale pattern of groups and clusters arranged in filaments, walls, and sheets, with voids between them, is called the .
10
Choose one
1 point
Which sequence best describes the basic early growth of galaxies?
- A
Stars formed first, and their gravity later created dark-matter halos.
- B
Dark matter gathered into halos, then gas collected, cooled, and formed stars.
- C
Clusters formed first, and galaxies later broke apart from them.
- D
Gas was stripped from mature galaxies before any stars formed.
11
Choose one
1 point
How do stellar winds and explosions contribute to the ongoing evolution of a galaxy’s gas?
- A
They remove all elements from the surrounding gas.
- B
They return material to space and enrich surrounding gas with elements made inside stars.
- C
They convert all surrounding gas into dark matter.
- D
They stop gas from entering or leaving the galaxy.
12
Choose all
1 point
Select all the supported ways gas can enter or leave a galaxy.
- A
Gas can enter a galaxy from intergalactic space.
- B
Interactions with neighboring galaxies can strip gas away.
- C
Dark matter emits light that supplies gas to a galaxy.
- D
Stars in a merger usually collide and release new gas.
13
Choose all
1 point
Select all outcomes that can result from close gravitational encounters or galaxy mergers.
- A
A galaxy can be distorted.
- B
Long streams of stars and gas can be pulled out.
- C
Gas clouds can be compressed, sometimes triggering a burst of star formation.
- D
The stars from the galaxies usually collide directly.
- E
Gas can be sent toward the center and sometimes feed the central black hole.
14
Open ended
1 point
How can observing galaxies at different distances help astronomers reconstruct galaxy evolution? Explain why distance provides evidence about different cosmic eras.
15
Choose one
1 point
A galaxy has a central bulge and a disk, but no prominent spiral arms. Which classification best fits this description?
- A
A disk with prominent spiral arms and abundant cold gas
- B
A disk and central bulge without prominent spiral arms
- C
A nearly round shape with stars moving in an orderly disk
- D
An irregular shape produced only by recent mergers
16
Choose one
1 point
Astronomers infer that a galaxy has an extended dark-matter halo even though they cannot detect light from the dark matter. Which observation-based effect is consistent with the halo's role?
- A
It produces most of the visible light from a galaxy's halo.
- B
It prevents stars and gas from moving within the galaxy.
- C
Its gravity influences how stars and gas move around the galaxy.
- D
It forms spiral arms by emitting energy into the disk.
17
True or false
1 point
During a galaxy merger, the stars in the two galaxies usually collide directly with one another.
- A
True
- B
False
18
Choose one
1 point
What is one way stellar winds and explosions can affect the material from which future stars may form?
- A
They return material to space, enriching surrounding gas with elements made inside stars.
- B
They remove all dark matter from the galaxy.
- C
They prevent gas from entering the galaxy.
- D
They turn the galaxy's stellar halo into a central bulge.
19
Written response
1 point
What term names the large-scale pattern of filaments, walls, and sheets that contains galaxies and clusters, with vast voids between them?
20
Written response
1 point
Are the groups and clusters in a supercluster generally bound together as one gravitational system? Enter yes or no.