The strength of the force of gravity depends on

the masses of the objects and the distance between them.

the distance light travels in a year.

Which of the following is a major difference between elliptical galaxies and spiral galaxies?

Ellipticalgalaxies have almostno gas ordust betweenthe stars

Characteristics used to classify stars include

size, brightness, and temperature.

The Hertzsprung-Russell diagram shows that main-sequence stars

increase in brightness as they increase in temperature.

Depending on its mass, a star may live from about

10 million to 200 billion years.

One indication that a planet may exist near a distant star is that

the star has a very slight back and forth motion

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Sun and Stars Common Assessment

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Earth Science

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Questions 20

Answers

1
The apparent movement of a star when seen from a different position is called
prominence.
parallax.
apparent brightness.
accretion.
2
The variable that determines whether a protostar becomes a star is its
mass.
surface temperature.
age.
color and brightness.
3
More than half of all stars are members of groups of two or more stars called
star systems.
star clusters.
eclipsing binaries.
galaxies.
4
A loose grouping of a few thousand stars is called a(n)
globular cluster.
elliptical galaxy.
quasar.
open cluster.
5
The strength of the force of gravity depends on
the masses of the objects and the distance between them.
the weight of the objects and their speeds.
the masses of the objects and their speeds.
the masses of the objects and their weights.
6
A light-year is
365 days.
the distance from Earth to Proxima Centauri.
the distance light travels in a year.
the amount of light the sun produces in a year.
7
Which of the following is a major difference between elliptical galaxies and spiral galaxies?
Ellipticalgalaxies have almostno gas ordust betweenthe stars
Spiral galaxies have almost no gas or dust between the stars
Elliptical galaxies vary more in shape than spiral galaxies.
Spiral galaxies contain only old stars.
8
The lifetime of a star depends on its
absolute brightness.
temperature.
apparent brightness.
mass.
9
Parallax is used to determine a star’s
distance from Earth.
temperature.
brightness.
composition.
10
A star is born when
nuclear fusion starts.
helium and oxygen combine.
a nebula expands.
a protostar begins to cool.
11
Characteristics used to classify stars include
distance, size, and color.
size, brightness, and temperature.
color, brightness, and distance.
size, distance, and brightness.
12
The Hertzsprung-Russell diagram shows that main-sequence stars
are mostly cool and bright.
decrease in brightness as they increase in temperature.
are mostly hot and dim.
increase in brightness as they increase in temperature.
13
Depending on its mass, a star may live from about
10 billion to 500 billion years.
10 million to 200 billion years.
1 million to 10 million years.
5 million to 100 million years.
14
What color are the coolest stars?
red
blue-white
orange
yellow
15
The absolute brightness of a star depends on its
color and temperature.
distance and color.
size and temperature.
distance and temperature.
16
What is a giant ball of hot gases that undergo nuclear fusion?
a planet
a star cluster
a solar system
a star
17
A supernova is the explosion of a dying
medium-mass star.
low-mass star.
high-mass star.
protostar.
18
Which two factors did Newton concluded combine keeping Earth in orbit?
weight and inertia
acceleration and inertia
gravity and weight
inertia and gravity
19
The Milky Way galaxy is an example of a(n)
quasar.
elliptical galaxy.
irregular galaxy.
spiral galaxy.
20
One indication that a planet may exist near a distant star is that
the star varies in temperature.
radio wave activity increases near the star.
the star has very strong gravity.
the star has a very slight back and forth motion

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