Question 1

A star's luminosity tells us

Accepted Answer

A) how much energy a star produces. 
B) its surface temperature. 
C) its rotational speed. 
D) both how much energy it produces and its surface temperature. 
A) how much energy a star produces. 
B) its surface temperature. 
C) its rotational speed. 
D) both how much energy it produces and its surface temperature. A

Question 2

Which one of these elements is normally the remnant of a supernova?

Accepted Answer

A) hydrogen 
B) helium 
C) silver 
D) none of these 
A) hydrogen 
B) helium 
C) silver 
D) none of these C

Question 3

The Milky Way galaxy is about

Accepted Answer

A) 4 light years in diameter. 
B) 40 light years in diameter. 
C) 100 light years in diameter. 
D) 100,000 light years in diameter. 
A) 4 light years in diameter. 
B) 40 light years in diameter. 
C) 100 light years in diameter. 
D) 100,000 light years in diameter. A

Question 4

Galaxies are aggregations of stars,stellar dust,and gas.Their masses

Accepted Answer

A) are all about the same,which is huge. 
B) vary greatly from one galaxy to the next. 
C) are small compared to blue supergiant stars. 
D) depend on the rate of pulsar emissions within them. 
A) are all about the same,which is huge. 
B) vary greatly from one galaxy to the next. 
C) are small compared to blue supergiant stars. 
D) depend on the rate of pulsar emissions within them.

Question 5

Elliptical galaxies

Accepted Answer

A) tend to be smaller than the other types of galaxies. 
B) have little in the way of dust and gas. 
C) are thought to be former starburst galaxies. 
D) All of the above 
A) tend to be smaller than the other types of galaxies. 
B) have little in the way of dust and gas. 
C) are thought to be former starburst galaxies. 
D) All of the above

Question 6

The longest living stars are those of

Accepted Answer

A) low mass. 
B) high mass. 
C) intermediate mass. 
A) low mass. 
B) high mass. 
C) intermediate mass.

Question 7

Which star will emit the shortest wavelength of its peak frequency?

Accepted Answer

A) a blue star 
B) a yellow star 
C) a red star 
D) a green star 
A) a blue star 
B) a yellow star 
C) a red star 
D) a green star

Question 8

Summer and winter constellations are different because

Accepted Answer

A) of the spin of the Earth about its polar axis. 
B) the night sky faces in opposite directions in summer and winter. 
C) of the tilt of the Earth's polar axis. 
D) the Earth is at the solar perigee in winter and apogee in summer. 
E) the universe is symmetric. 
A) of the spin of the Earth about its polar axis. 
B) the night sky faces in opposite directions in summer and winter. 
C) of the tilt of the Earth's polar axis. 
D) the Earth is at the solar perigee in winter and apogee in summer. 
E) the universe is symmetric.

Question 9

In which city is Polaris highest in the sky?

Accepted Answer

A) Singapore 
B) Mexico City 
C) Denver 
D) Anchorage 
E) All the same,depending on the time of night 
A) Singapore 
B) Mexico City 
C) Denver 
D) Anchorage 
E) All the same,depending on the time of night

Question 10

Seasons here are Earth are a result of

Accepted Answer

A) the rotation of our planet about its axis. 
B) the revolution of our planet around the Sun. 
C) the movement of our planet within the Milky Way. 
D) the tilt of Earth's axis. 
A) the rotation of our planet about its axis. 
B) the revolution of our planet around the Sun. 
C) the movement of our planet within the Milky Way. 
D) the tilt of Earth's axis.

Question 11

Thermonuclear fusion occurs mainly in the

Accepted Answer

A) cores of stars. 
B) outer layers of stars. 
C) both,actually 
A) cores of stars. 
B) outer layers of stars. 
C) both,actually

Question 12

A black hole is

Accepted Answer

A) a region of space that is collapsed in on itself. 
B) the result of the collapse of supergiant star. 
C) likely found at the center of each spiral galaxy. 
D) All of the above 
A) a region of space that is collapsed in on itself. 
B) the result of the collapse of supergiant star. 
C) likely found at the center of each spiral galaxy. 
D) All of the above

Question 13

Quasars are

Accepted Answer

A) ancient,extremely high energy galaxies believed to have formed in the early universe. 
B) a conglomeration of pulsars within a galaxy. 
C) a conglomeration of spiral galaxies. 
D) white dwarfs that have undergone final collapse. 
A) ancient,extremely high energy galaxies believed to have formed in the early universe. 
B) a conglomeration of pulsars within a galaxy. 
C) a conglomeration of spiral galaxies. 
D) white dwarfs that have undergone final collapse.

Question 14

A star's color tells us

Accepted Answer

A) how much energy a star produces. 
B) its surface temperature. 
C) its rotational speed. 
D) both how much energy it produces and its surface temperature. 
A) how much energy a star produces. 
B) its surface temperature. 
C) its rotational speed. 
D) both how much energy it produces and its surface temperature.

Question 15

Stars to the lower left of the Hertzsprung-Russell diagram tend to be relatively

Accepted Answer

A) hot and blue. 
B) long lasting. 
C) huge and massive. 
D) yellow and of average size. 
A) hot and blue. 
B) long lasting. 
C) huge and massive. 
D) yellow and of average size.

Question 16

The stars Procyon and Betelgeuse both appear equally bright to Earthbound viewers.Yet Betelgeuse emits 5000 times more light than Procyon.Why do they appear to be equally bright?

Accepted Answer

A) because Betelgeuse is much farther than Procyon 
B) because Betelgeuse is undergoing fission,not fusion 
C) because Betelgeuse lies in the same plane of Earth's orbit 
D) because Procyon is superhot 
A) because Betelgeuse is much farther than Procyon 
B) because Betelgeuse is undergoing fission,not fusion 
C) because Betelgeuse lies in the same plane of Earth's orbit 
D) because Procyon is superhot

Question 17

We do not see stars in the daytime because

Accepted Answer

A) the Sun blocks their view. 
B) they simply don't exist in the daytime part of the sky. 
C) skylight overwhelms starlight. 
D) of the lack of contrast with moonlight. 
E) the solar wind obscures their view. 
A) the Sun blocks their view. 
B) they simply don't exist in the daytime part of the sky. 
C) skylight overwhelms starlight. 
D) of the lack of contrast with moonlight. 
E) the solar wind obscures their view.

Question 18

How is a larger star like an SUV,while a smaller star like a fuel efficient hybrid vehicle?

Accepted Answer

A) The larger the star,the faster it burns fuel. 
B) The larger the star,the more likely it is to explode. 
C) The larger the star,the shorter its life span. 
D) Larger stars have only one source of energy. 
A) The larger the star,the faster it burns fuel. 
B) The larger the star,the more likely it is to explode. 
C) The larger the star,the shorter its life span. 
D) Larger stars have only one source of energy.

Question 19

The nearest star system closest to our Sun is about

Accepted Answer

A) 4 light years away. 
B) 20 light years away. 
C) 100 light years away. 
D) 40,000 light years away. 
A) 4 light years away. 
B) 20 light years away. 
C) 100 light years away. 
D) 40,000 light years away.

Question 20

The daily motion of celestial objects in the sky is caused by

Accepted Answer

A) the rotation of our planet about its axis. 
B) the revolution of our planet around the Sun. 
C) the movement of our planet within the Milky Way. 
D) the tilt of Earth's axis. 
A) the rotation of our planet about its axis. 
B) the revolution of our planet around the Sun. 
C) the movement of our planet within the Milky Way. 
D) the tilt of Earth's axis.

Exam 27: Stars and Galaxies

A star's luminosity tells us

Which one of these elements is normally the remnant of a supernova?

The Milky Way galaxy is about

Galaxies are aggregations of stars,stellar dust,and gas.Their masses

Elliptical galaxies

The longest living stars are those of

Which star will emit the shortest wavelength of its peak frequency?

Summer and winter constellations are different because

In which city is Polaris highest in the sky?

Seasons here are Earth are a result of

Thermonuclear fusion occurs mainly in the

A black hole is

Quasars are

A star's color tells us

Stars to the lower left of the Hertzsprung-Russell diagram tend to be relatively

The stars Procyon and Betelgeuse both appear equally bright to Earthbound viewers.Yet Betelgeuse emits 5000 times more light than Procyon.Why do they appear to be equally bright?

We do not see stars in the daytime because

How is a larger star like an SUV,while a smaller star like a fuel efficient hybrid vehicle?

The nearest star system closest to our Sun is about

The daily motion of celestial objects in the sky is caused by

Patterns of Motion and Equilibrium

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Thermal Energy and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light

Atoms and the Periodic Table

The Atomic Nucleus and Radioactivity

Elements of Chemistry

How Atoms Bond and Molecules Attract

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Organic Compounds

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Time - Reading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

The Structure of Space and Time

Prologue: The Nature of Science

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