Answers2627 EARTH SPACE SCIENCE AStar Systems and Galaxies

Lesson 6.5 Star Systems and Galaxies Answers

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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.
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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
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binary globular cluster ✔ open cluster

A
binary
B
globular cluster
C
✔ open cluster
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binary ✔ globular clusteropen cluster

A
binary
B
✔ globular cluster
C
open cluster
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globular cluster✔ open clusterbinary

A
globular cluster
B
✔ open cluster
C
binary
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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
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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
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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
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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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Which ideas did you include in your answer? Check all that apply.

A
NGC 1427A is an irregular galaxy.
B
U is a spiral galaxy.
C
Both galaxies contain plenty of dust and gas.
D
Both galaxies have active star-forming sites.
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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.
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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

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