AnswersAZ-Earth and Space Science A SC301Unit Test

Unit Test — Unit test Answers

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1
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Which type of star system has the most stars?

A
open cluster
B
globular cluster
C
eclipsing binary
D
binary star system
2
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Which statement explains how planets move in orbit as supported by Newton’s first law of motion?

A
Planets can change the direction of their own orbital path.
B
Planets can change orbits due to their inertia.
C
Planets in motion will have a constant speed unless acted on by an outside force.
D
Planets with a greater mass will orbit more quickly than smaller planets.
3

How did Galileo increase public support for Copernicus’s model?

A
by publishing his work in Italian
B
by using data collected by Tycho Brahe
C
by explaining why planets appear to move backward
D
by arguing that Earth’s rotation makes objects appear to move in the sky
4

Which correctly lists three planets that have rings?

A
Jupiter, Mars, Saturn
B
Mars, Jupiter, Mercury
C
Mercury, Mars, Venus
D
Neptune, Uranus, Jupiter
5

Which planet revolves slowly around the Sun, has rings, and is known for its Great Red Spot?

A
Jupiter
B
Mars
C
Neptune
D
Saturn
6

What was the purpose of the Apollo program?

A
to put a man in orbit
B
to launch a spy satellite
C
to launch a space station
D
to put man on the moon
7

Which is capable of housing astronauts while they conduct research?

A
a rover
B
a satellite
C
a space station
D
a space observatory
8

What is some of the evidence used by Galileo to support Copernicus’s model and disprove Aristotle and Ptolemy’s?

A
Each planet spins in an epicycle.
B
Planets appear to move backward.
C
Jupiter has moons orbiting it.
D
The religious and cultural beliefs supported this model.
9

Which two characteristics are used to classify stars on the Hertzsprung-Russell diagram?

A
size and density
B
density and composition
C
composition and temperature
D
temperature and absolute brightness
10

What is a nebula?

A
the core of a massive star
B
a cloud of gas and dust in space
C
a swirling disk with a lot of gravity
D
the debris remaining after a supernova
11

Which statement accurately describes a light-year?

A
It is the shape of a galaxy.
B
It is the distance that light travels in a year.
C
It is a yearly measurement of light given off by stars.
D
It is the amount of time it takes light to travel one million kilometers.
12

Look at the diagram of the moon and three different paths that it could take.

Question illustration
A
the path of the moon toward the Sun
B
the path of the moon’s orbit around Earth
C
the path the moon would take if it had a larger mass than the Sun
D
the path the moon would take if there was no force of Earth’s gravity
13

According to the big bang theory, which statement is accurate about how the universe came to be?

A
It expanded slowly.
B
It gradually warmed.
C
Stars and galaxies formed.
D
Atoms such as hydrogen were destroyed.
14

About how long does it take Earth to complete one revolution around the Sun?

A
1 year
B
14 days
C
24 hours
D
27.3 days
15

Which object(s) formed last in our solar system?

A
the Sun
B
the solar nebula
C
the inner planets
D
the planetesimals
16

How is the moon illuminated?

A
It produces its own light.
B
It reflects light from the Sun.
C
It transforms energy into light.
D
It absorbs light from the Earth.
17

How was Aristotle’s model similar to Ptolemy’s model?

A
Both models stated that the planets rotate on their axes.
B
Both models stated that Earth is the center of the system around which other objects orbit.
C
Both models stated that the planets and objects in the solar system have small orbits called epicycles.
D
Both models stated that the Sun is the center of the system around which objects have elliptical orbits.
18

Which event occurs during high tide?

A
All of Earth’s ocean levels rise.
B
The moon’s orbit is closer to Earth.
C
The gravity of the Sun and moon cause the Earth’s crust and water to bulge.
D
Earth’s crust and water are being pulled in opposite directions by the Sun and moon.
19

Which planet is terrestrial?

A
Jupiter
B
Mars
C
Saturn
D
Uranus
20

What occurs when the moon blocks the view of the Sun?

A
neap tide
B
spring tide
C
solar eclipse
D
lunar eclipse

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