AnswersEarth Systems AOther Objects in the Solar System

Other Objects in the Solar System — Unit test Answers

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1
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Which statement correctly describes terrestrial planets?

A
They are made of mostly rock.
B
They are made of gases.
C
They are small objects of ice and dust.
D
They are very large compared to other planets.
2
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Which list correctly orders the outer planets from least to greatest distance from the Sun?

A
Jupiter, Saturn, Uranus, Neptune
B
Saturn, Jupiter, Uranus, Neptune
C
Jupiter, Saturn, Neptune, Uranus
D
Neptune, Uranus, Saturn, Jupiter
3

Why did scientists struggle for thousands of years to accurately describe the solar system?

A
Venus has phases like the moon.
B
Many people spoke Italian and did not understand Latin.
C
The planets appeared to move backward in the sky occasionally.
D
Scientists could not explain why the Sun appeared to rise and set every day.
4

Which planet in the solar system is least dense?

A
Jupiter
B
Mercury
C
Neptune
D
Saturn
5

Whose data did Kepler use to construct the laws of planetary motion?

A
Aristarchus’s
B
Aristotle’s
C
Brahe’s
D
Copernicus’s
6

Which is a type of star system?

A
dim stars
B
solar system planets
C
wobbling stars
D
globular clusters
7

Observable matter makes up about what percentage of the universe?

5
5%
1
10%
5
50%
9
95%
8

Which type of star will become a black hole when it dies?

a
a protostar
a
a supergiant
a
a white dwarf
a
a red dwarf
9

What force acts between Earth and the moon?

g
gravity
m
mass
m
motion
n
newtons
10

Which is one physical property that all stars have?

A
They are made of gases.
B
They shine very brightly.
C
They have a triangle shape.
D
They contain iron in their cores.
11

Which planet is small, with a rocky surface and an atmosphere?

A
Jupiter
B
Neptune
C
Uranus
D
Venus
12

Which discovery did Galileo make to support the theory that the planets, including Earth, orbit the Sun?

A
Venus has phases.
B
The orbits of the planets are elliptical
C
Earth’s rotation causes the Sun to rise in the sky.
D
The planets move faster when they orbit closer to the Sun.
13

In which direction does Earth rotate?

A
eastward around its axis
B
in an ellipse around the Sun
C
counterclockwise around the Sun
D
from north to south around its axis
14

Which diagram correctly describes the changes that occur as a small piece of rock falls from space and hits the Earth?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
15

Which remains the same as the distance of an object from Earth changes?

A
size of the force
B
strength of gravity
C
mass of the object
D
weight of the object

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