Star Systems and Galaxies Answers

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Which characteristics can be used to differentiate star systems? Select three options.the number of stars in the systemthe level of dust and gasthe age of the stars in the systemthe way stars are organized in the systemthe color of stars in the system

A
the number of stars in the system
B
the level of dust and gas
C
the age of the stars in the system
D
the way stars are organized in the system
E
the color of stars in the system
4

Choose the word from the drop-down menu that completes each sentence.

Answers:
A/An star system is made of two stars.:binary
A/An star system is made of no more than a few thousand stars.:open cluster
A/An star system is made of more than a million stars.:globular cluster
5

A/An [___] star system is made of two stars.

A
binary
B
globular cluster
C
open cluster
6

[___]

A
globular cluster
B
open cluster
C
binary
7

Based on the information in the article, which title would be most appropriate?

A
New Planet Found in Open Cluster System
B
New Planet Discovered in Binary Star System
C
Discovery: New Globular Cluster and Planet
D
Discovery: Star System Orbiting New Planet
8

Which characteristic is used to classify galaxies?

A
the size of the galaxy
B
the shape of the galaxy
C
the presence of dust and gas between stars
D
the presence of active star formation sites
9

Which statement describes the image?

A
This is an image of an elliptical galaxy.
B
This is an image of an irregular galaxy.
C
This is an image of a normal spiral galaxy.
D
This is an image of a barred spiral galaxy.
10

Which characteristics can be used to differentiate star systems? Select three options.

A
the number of stars in the system
B
the level of dust and gas
C
the age of the stars in the system
D
the way stars are organized in the system
E
the color of stars in the system
12

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A
globular cluster
B
open cluster
C
binary
13

Based on the information in the article, which title would be most appropriate?

A
New Planet Found in Open Cluster System
B
New Planet Discovered in Binary Star System
C
Discovery: New Globular Cluster and Planet
D
Discovery: Star System Orbiting New Planet
14

Which characteristic is used to classify galaxies?

A
the size of the galaxy
B
the shape of the galaxy
C
the presence of dust and gas between stars
D
the presence of active star formation sites
15

How are NGC 1427A and U different? How are they the same?

Answer:

NGC 1427A and U are both examples of irregular galaxies, meaning they lack a distinct, symmetrical shape like spiral or elliptical galaxies. They are different in their origins and specific characteristics: NGC 1427A is a galaxy being torn apart by gravitational forces as it travels through a galaxy cluster, while U (often referring to specific dwarf irregulars or general classification) represents a different stage of galactic evolution or environment. Generally, they are the same in their classification as irregulars but differ in their size, composition, and the environmental forces acting upon them.

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