Unit Test — Unit test Answers

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Which correctly lists three planets that have rings?

A
Jupiter, Mars, Saturn
B
Mars, Jupiter, Mercury
C
Mercury, Mars, Venus
D
Neptune, Uranus, Jupiter
3

Which planet is terrestrial?

A
Jupiter
B
Mars
C
Saturn
D
Uranus
4

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.
5

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.
6

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

A
neap tide
B
spring tide
C
solar eclipse
D
lunar eclipse
7

What are the two main types of star clusters?

A
binary and wobbling
B
eclipsing and binary
C
globular and eclipsing
D
open and globular
8

Which type of star system has the most stars?

A
open cluster
B
globular cluster
C
eclipsing binary
D
binary star system
9

What will a medium-mass star become at the very end of its life cycle?

A
a red giant
B
a black hole
C
a black dwarf
D
a neutron star
11

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
12

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

A
the Sun
B
the solar nebula
C
the inner planets
D
the planetesimals
13

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.
16

When two objects are near each other, how would increasing one object’s mass affect it?

A
The shape of the object would change.
B
The weight of the object would decrease.
C
The gravitational force of the object would increase.
D
The mass of the object would be stronger than gravity.
17

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
18

What can be observed only by observing its effects on gravity?

A
dark matter
B
a solar nebula
C
gas and dust
D
a planetesimal
20

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.

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