Question 1

The difference in brightness between two stars is related to the

Accepted Answer

A) amount of light and energy produced by the stars. 
B) relative size of the stars. 
C) distance to the stars. 
D) All of the above. 
A) amount of light and energy produced by the stars. 
B) relative size of the stars. 
C) distance to the stars. 
D) All of the above. D

Question 2

The core of a star is plasma with the density of solid lead.

Accepted Answer

A) True 
 B)False  True

Question 3

The absolute magnitude considers the brightness of a star when at a standard distance.

Accepted Answer

A) True 
 B)False  True

Question 4

Nearby stars appear to move ____ relative to Polaris.

Accepted Answer

A) clockwise 
B) counter-clockwise 
C) straight by 
D) in looping circles 
A) clockwise 
B) counter-clockwise 
C) straight by 
D) in looping circles

Question 5

About how old is the universe?

Accepted Answer

A) 6.0 billion years 
B) 10.5 billion years 
C) 13.7 billion years 
D) 20 billion years 
A) 6.0 billion years 
B) 10.5 billion years 
C) 13.7 billion years 
D) 20 billion years

Question 6

Which of the following depends on your location on Earth?

Accepted Answer

A) celestial pole 
B) celestial meridian 
C) celestial equator 
D) All of these depend on your location. 
A) celestial pole 
B) celestial meridian 
C) celestial equator 
D) All of these depend on your location.

Question 7

In which part of a newborn star does the fusion reaction occur?

Accepted Answer

A) the core 
B) the radiation zone 
C) the convection zone 
D) in all parts of the star 
A) the core 
B) the radiation zone 
C) the convection zone 
D) in all parts of the star

Question 8

Which type of star has the shortest life span?

Accepted Answer

A) large, very massive 
B) small, not very massive 
C) one on the main sequence 
D) a star about the size of our Sun 
A) large, very massive 
B) small, not very massive 
C) one on the main sequence 
D) a star about the size of our Sun

Question 9

Compared to magnitude 1 star, a star with a magnitude of 2 is

Accepted Answer

A) more than twice as bright. 
B) less than half as bright. 
C) ten times as bright. 
D) less than one tenth as bright. 
A) more than twice as bright. 
B) less than half as bright. 
C) ten times as bright. 
D) less than one tenth as bright.

Question 10

The location of the celestial meridian is determined by your location.

Accepted Answer

A) True 
 B)False

Question 11

Earth rotates

Accepted Answer

A) from west to east. 
B) from east to west. 
C) at the same rate as it revolves around the Sun. 
D) twice each day. 
A) from west to east. 
B) from east to west. 
C) at the same rate as it revolves around the Sun. 
D) twice each day.

Question 12

A light-year is a measure of astronomical distance.

Accepted Answer

A) True 
 B)False

Question 13

Compared to a star like the Sun, a blue-white star

Accepted Answer

A) is more massive. 
B) has a higher surface temperature. 
C) burns its fuel at a greater rate. 
D) All of the above. 
A) is more massive. 
B) has a higher surface temperature. 
C) burns its fuel at a greater rate. 
D) All of the above.

Question 14

A protostar is an accumulation of gases in outer space that will become a star.

Accepted Answer

A) True 
 B)False

Question 15

Nuclear fusion reactions occur in what part of a star?

Accepted Answer

A) core 
B) radiation zone 
C) convection zone 
D) All of the above. 
A) core 
B) radiation zone 
C) convection zone 
D) All of the above.

Question 16

Most of the stars plotted on a H-R diagram are

Accepted Answer

A) red giant stars. 
B) white dwarf stars. 
C) cepheid variables. 
D) main sequence stars. 
A) red giant stars. 
B) white dwarf stars. 
C) cepheid variables. 
D) main sequence stars.

Question 17

Which of the following star colors has the highest temperature?

Accepted Answer

A) blue 
B) white 
C) yellow 
D) red 
A) blue 
B) white 
C) yellow 
D) red

Question 18

More massive stars tend to use up their supply of hydrogen more rapidly.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following is evidence for the existence of "dark matter" in the universe?

Accepted Answer

A) The rate of expansion of the universe is speeding up. 
B) Stars eventually use up their fuel and stop shining. 
C) The outlying stars in a galaxy appear to rotate more rapidly than expected. 
D) Either there is no proof that dark matter exists, or there is no way to calculate its abundance. 
A) The rate of expansion of the universe is speeding up. 
B) Stars eventually use up their fuel and stop shining. 
C) The outlying stars in a galaxy appear to rotate more rapidly than expected. 
D) Either there is no proof that dark matter exists, or there is no way to calculate its abundance.

Question 20

If the density of the universe is less than a critical value, then

Accepted Answer

A) it might eventually stop expanding. 
B) it might continue expanding forever. 
C) it could expand to a fixed size and remain. 
D) there's probably less dark matter than luminous. 
A) it might eventually stop expanding. 
B) it might continue expanding forever. 
C) it could expand to a fixed size and remain. 
D) there's probably less dark matter than luminous.

Exam 14: The Universe

The difference in brightness between two stars is related to the

The core of a star is plasma with the density of solid lead.

The absolute magnitude considers the brightness of a star when at a standard distance.

Nearby stars appear to move ____ relative to Polaris.

About how old is the universe?

Which of the following depends on your location on Earth?

In which part of a newborn star does the fusion reaction occur?

Which type of star has the shortest life span?

Compared to magnitude 1 star, a star with a magnitude of 2 is

The location of the celestial meridian is determined by your location.

Earth rotates

A light-year is a measure of astronomical distance.

Compared to a star like the Sun, a blue-white star

A protostar is an accumulation of gases in outer space that will become a star.

Nuclear fusion reactions occur in what part of a star?

Most of the stars plotted on a H-R diagram are

Which of the following star colors has the highest temperature?

More massive stars tend to use up their supply of hydrogen more rapidly.

Which of the following is evidence for the existence of "dark matter" in the universe?

If the density of the universe is less than a critical value, then

What Is Science

Motion

Energy

Heat and Temperature

Wave Motions and Sound

Electricity

Light

Atoms and Periodic Properties

Chemical Bonds

Chemical Reactions

Water and Solutions

Organic Chemistry

Nuclear Reactions

The Solar System

Earth in Space

Rocks and Minerals

Plate Tectonics

Building Earths Surface

Shaping Earths Surface

Geologic Time

The Atmosphere of Earth

Weather and Climate

Earths Waters

Filters