Answers2627 EARTH SPACE SCIENCE AStar Systems and Galaxies

Lesson 6.5 Star Systems and Galaxies Answers

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1
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Which sentence accurately describes star clusters?

A
Stars appear brighter.
B
Stars form large groupings.
C
Stars form at different times.
D
Stars form from different nebula.
2
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Which term refers to large groupings of stars?

A
nebulas
B
galaxies
C
binary stars
D
star clusters
3

Look at this image of a galaxy.

Question illustration
A
elliptical
B
irregular
C
normal spiral
D
barred spiral
4

Which statement describes a characteristic of a spiral galaxy?

A
It is shaped like a pinwheel.
B
It has no new star formation.
C
It is made only of gases.
D
It is smaller than other types of galaxies.
5

Which phrase best defines a galaxy?

A
tightly packed group of older stars
B
large grouping of more than two stars
C
loose, disorganized star cluster held together by gravity
D
large collection of stars, gas, and dust held together by gravity
6

Which statement accurately describes binary star systems?

A
They have more than two stars.
B
They have stars that are always visible.
C
They include large groups of stars.
D
They have stars that might appear to wobble.
7

Look at this image of a galaxy.

Question illustration
A
barred
B
elliptical
C
irregular
D
spiral
8

Which sentence accurately describes star clusters?

A
Stars appear brighter.
B
Stars form large groupings.
C
Stars form at different times.
D
Stars form from different nebula.
9

Which statement describes a characteristic of a spiral galaxy?

A
It is shaped like a pinwheel.
B
It has no new star formation.
C
It is made only of gases.
D
It is smaller than other types of galaxies.
10

Which type of star cluster forms from tightly packed groups of older stars?

A
binary
B
eclipse
C
globular
D
open
11

Two types of spiral galaxies exist. A normal spiral galaxy is one kind. Which phrase best describes the second type of spiral galaxy?

A
is football-shaped
B
is irregularly shaped
C
has arms that start close to the center
D
has a bar through the middle from which arms extend
12

The dimmer star in a two-star system passes in front of the brighter star. Which phenomenon does this describe?

A
nebular cluster
B
globular cluster
C
wobbling binary
D
eclipsing binary
13

Which feature is used to classify galaxies?

A
age
B
color
C
shape
D
size
14

Look at this image of a galaxy.

Question illustration
A
elliptical
B
irregular
C
normal spiral
D
barred spiral
15

Which phrase accurately describes an elliptical galaxy?

A
may be spiral-shaped
B
has no recognizable shape
C
has no new stars being formed
D
has a lot of gas and dust between stars
16

Which term refers to large groupings of stars?

A
nebulas
B
galaxies
C
binary stars
D
star clusters
17

What phrase best defines a star system?

A
a group of hundreds of stars
B
a group of two or more stars
C
a group of stars that formed around the same time
D
a group of two stars in which one star is brighter than the other
18

Which type of star cluster is loose and disorganized?

A
binary
B
eclipse
C
globular
D
open
19

Which phrase describes an irregular galaxy?

A
has a round shape
B
does not have a specific shape
C
has arms that extend from the center
D
is larger than other types of galaxies
20

Look at this image of a star cluster.

Question illustration
A
open
B
binary
C
globular
D
eclipsing

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