All Chapters Included ✅
The Cosmic Perspective, 10e (Bennett)
Chapter 1 A Modern View of the Universe Answers Included ✅
Section 1.1 A+ Grade ✅
1) About where is our solar system located within the Milky Way Galaxy?
A) at the center of the galaxy
B) about 10 percent of the way from the center of the galaxy to the edge of the galactic disk
C) about halfway from the center of the galaxy to the edge of the galactic disk
D) near the far edge of the galactic disk
E) in the halo of the galaxy above the galactic disk
Answer: C
2) When we speak of the entire universe (as opposed to the observable universe), we mean
A) all the stars and galaxies that we can see with telescopes.
B) all material located within about 14 billion light-years of Earth.
C) the sum total of all matter and energy.
D) all the matter in galaxies, but not the spaces between the galaxies.
Answer: C
3) Which of the following is the smallest distance?
A) diameter of a typical planet
B) 1 light-second
C) 1 AU
D) diameter of a typical star
Answer: A
4) Which of the following is the largest distance?
A) diameter of a typical galaxy
B) diameter of Pluto's orbit
C) distance to the nearest star (other than our Sun)
D) 1 light-year
Answer: A
5) Which of the following statements does not use the term light-year in an appropriate way?
A) It's about 4 light-years from here to Alpha Centauri.
B) It will take me light-years to complete this homework assignment.
C) A light-year is about 10 trillion kilometers.
D) It will take the Voyager spacecraft about 20,000 years to travel just 1 light-year.
E) The Milky Way Galaxy is about 100,000 light-years in diameter.
Answer: B
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,6) One light-minute is the distance that light travels in one minute. How far is this, in kilometers?
(Recall that the speed of light is 300,000 km/s.)
A) 300,000 km
B) 18 million km
C) 100 million km
D) 1.08 billion km
E) 9.46 trillion km
Answer: B
7) One light-year is approximately
A) the distance from the Sun to Earth.
B) the speed at which Earth orbits the Sun.
C) 10 trillion kilometers.
D) the same as one regular year.
Answer: C
8) Light takes approximately one second to travel from Earth to the Moon. This means that the
Moon is approximately
A) 1 astronomical unit from Earth.
B) 1 light-year from Earth.
C) 3000 kilometers from Earth.
D) 300,000 kilometers from Earth.
E) near the top of Earth's atmosphere.
Answer: D
9) Sunlight takes about 8.4 minutes to travel from the Sun to Earth. When NASA's New
Horizons Spacecraft passed Pluto in 2015, it was about 32 AU from Earth. About how long did it
take for transmitted images of Pluto to travel from the spacecraft to Earth?
A) one Plutonian year
B) 4-1/2 hours
C) 2-1/4 days
D) 3 weeks
E) They arrived almost instantaneously.
Answer: B
10) The Voyager 2 Spacecraft is currently on its way out of our solar system at a speed of about
50,000 kilometers per hour. It will reach the distance of the nearest star system (beyond our solar
system) in about ________ years.
A) 100
B) 1000
C) 10,000
D) 100,000
E) 1,000,000
Answer: D
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,11) Suppose we look at a photograph of many galaxies. Assuming that all galaxies formed at
about the same time, which galaxy in the picture is the youngest?
A) the one that is farthest away
B) the one that is reddest in color
C) the one that is bluest in color
D) the one that is closest to us
E) the one that appears smallest in size
Answer: A
12) The farthest galaxies visible in photos from the James Webb Space Telescope are roughly
________ light-years away.
A) 1 million
B) 13 million
C) 1 billion
D) 13 billion
E) 13 trillion
Answer: D
13) Suppose we imagine the Sun to be about the size of a grapefruit. Which of the following best
describes the size and distance of Earth on the same scale?
A) Earth is the size of a tip of a ballpoint pen about 1 meter from the Sun.
B) Earth is the size of a golf ball about 1 meter from the Sun.
C) Earth is the size of a tip of a ballpoint pen about 15 meters from the Sun.
D) Earth is the size of a golf ball about 15 meters from the Sun.
E) Earth is the size of a marble about 25 miles from the Sun.
Answer: C
14) Suppose we imagine the Sun to be about the size of a grapefruit. How big an area would the
orbits of the eight planets of the solar system cover?
A) the size of a typical dorm room
B) the size of a typical campus building
C) the size of a typical campus
D) the size of a small city
E) the size of a western state (e.g., Colorado)
Answer: C
15) Which of the following best describes the Milky Way Galaxy?
A) a spiral galaxy with a disk about 100,000 light-years in diameter
B) a spiral galaxy with a disk about 1 billion kilometers in diameter
C) a spiral galaxy with a disk about 1000 light-years in diameter
D) a spherically shaped galaxy that is about 4 light-years in diameter
E) a spherically shaped galaxy that is about 100,000 light-years in diameter
Answer: A
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, 16) If we use 1 millimeter to represent 1 light-year, about how large in diameter is the Milky
Way Galaxy?
A) 100 millimeters
B) 100 meters
C) 1 kilometer
D) 100 kilometers
E) 1 million millimeters
Answer: B
17) How long would it take to count all the stars in the Milky Way Galaxy at a rate of one star
per second?
A) several days
B) several weeks
C) several years
D) several thousand years
E) hundreds of thousands of years
Answer: D
18) About how many galaxies are there in the observable universe?
A) roughly (within about a factor of 10) the same as the number of stars in our galaxy
B) a few dozen
C) a few thousand
D) about as many as the number of grains of sand on all the beaches on Earth
E) an infinite number
Answer: A
19) If you represented each star by a grain of sand, about how much sand would it take to
represent all the stars in the observable universe?
A) all the sand in a typical playground sandlot
B) all the sand on Miami Beach
C) all the sand on the beaches of California
D) one cubic meter of sand
E) all the sand on all the beaches on Earth
Answer: E
20) Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In that
case
A) we are seeing Galaxy 1 as it looked at an earlier time in the history of the universe than
Galaxy 2.
B) we can't say anything about these galaxies except for their distances.
C) we are seeing Galaxy 1 as it looked at a later time in the history of the universe than Galaxy 2.
Answer: A
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The Cosmic Perspective, 10e (Bennett)
Chapter 1 A Modern View of the Universe Answers Included ✅
Section 1.1 A+ Grade ✅
1) About where is our solar system located within the Milky Way Galaxy?
A) at the center of the galaxy
B) about 10 percent of the way from the center of the galaxy to the edge of the galactic disk
C) about halfway from the center of the galaxy to the edge of the galactic disk
D) near the far edge of the galactic disk
E) in the halo of the galaxy above the galactic disk
Answer: C
2) When we speak of the entire universe (as opposed to the observable universe), we mean
A) all the stars and galaxies that we can see with telescopes.
B) all material located within about 14 billion light-years of Earth.
C) the sum total of all matter and energy.
D) all the matter in galaxies, but not the spaces between the galaxies.
Answer: C
3) Which of the following is the smallest distance?
A) diameter of a typical planet
B) 1 light-second
C) 1 AU
D) diameter of a typical star
Answer: A
4) Which of the following is the largest distance?
A) diameter of a typical galaxy
B) diameter of Pluto's orbit
C) distance to the nearest star (other than our Sun)
D) 1 light-year
Answer: A
5) Which of the following statements does not use the term light-year in an appropriate way?
A) It's about 4 light-years from here to Alpha Centauri.
B) It will take me light-years to complete this homework assignment.
C) A light-year is about 10 trillion kilometers.
D) It will take the Voyager spacecraft about 20,000 years to travel just 1 light-year.
E) The Milky Way Galaxy is about 100,000 light-years in diameter.
Answer: B
2
,6) One light-minute is the distance that light travels in one minute. How far is this, in kilometers?
(Recall that the speed of light is 300,000 km/s.)
A) 300,000 km
B) 18 million km
C) 100 million km
D) 1.08 billion km
E) 9.46 trillion km
Answer: B
7) One light-year is approximately
A) the distance from the Sun to Earth.
B) the speed at which Earth orbits the Sun.
C) 10 trillion kilometers.
D) the same as one regular year.
Answer: C
8) Light takes approximately one second to travel from Earth to the Moon. This means that the
Moon is approximately
A) 1 astronomical unit from Earth.
B) 1 light-year from Earth.
C) 3000 kilometers from Earth.
D) 300,000 kilometers from Earth.
E) near the top of Earth's atmosphere.
Answer: D
9) Sunlight takes about 8.4 minutes to travel from the Sun to Earth. When NASA's New
Horizons Spacecraft passed Pluto in 2015, it was about 32 AU from Earth. About how long did it
take for transmitted images of Pluto to travel from the spacecraft to Earth?
A) one Plutonian year
B) 4-1/2 hours
C) 2-1/4 days
D) 3 weeks
E) They arrived almost instantaneously.
Answer: B
10) The Voyager 2 Spacecraft is currently on its way out of our solar system at a speed of about
50,000 kilometers per hour. It will reach the distance of the nearest star system (beyond our solar
system) in about ________ years.
A) 100
B) 1000
C) 10,000
D) 100,000
E) 1,000,000
Answer: D
3
,11) Suppose we look at a photograph of many galaxies. Assuming that all galaxies formed at
about the same time, which galaxy in the picture is the youngest?
A) the one that is farthest away
B) the one that is reddest in color
C) the one that is bluest in color
D) the one that is closest to us
E) the one that appears smallest in size
Answer: A
12) The farthest galaxies visible in photos from the James Webb Space Telescope are roughly
________ light-years away.
A) 1 million
B) 13 million
C) 1 billion
D) 13 billion
E) 13 trillion
Answer: D
13) Suppose we imagine the Sun to be about the size of a grapefruit. Which of the following best
describes the size and distance of Earth on the same scale?
A) Earth is the size of a tip of a ballpoint pen about 1 meter from the Sun.
B) Earth is the size of a golf ball about 1 meter from the Sun.
C) Earth is the size of a tip of a ballpoint pen about 15 meters from the Sun.
D) Earth is the size of a golf ball about 15 meters from the Sun.
E) Earth is the size of a marble about 25 miles from the Sun.
Answer: C
14) Suppose we imagine the Sun to be about the size of a grapefruit. How big an area would the
orbits of the eight planets of the solar system cover?
A) the size of a typical dorm room
B) the size of a typical campus building
C) the size of a typical campus
D) the size of a small city
E) the size of a western state (e.g., Colorado)
Answer: C
15) Which of the following best describes the Milky Way Galaxy?
A) a spiral galaxy with a disk about 100,000 light-years in diameter
B) a spiral galaxy with a disk about 1 billion kilometers in diameter
C) a spiral galaxy with a disk about 1000 light-years in diameter
D) a spherically shaped galaxy that is about 4 light-years in diameter
E) a spherically shaped galaxy that is about 100,000 light-years in diameter
Answer: A
4
, 16) If we use 1 millimeter to represent 1 light-year, about how large in diameter is the Milky
Way Galaxy?
A) 100 millimeters
B) 100 meters
C) 1 kilometer
D) 100 kilometers
E) 1 million millimeters
Answer: B
17) How long would it take to count all the stars in the Milky Way Galaxy at a rate of one star
per second?
A) several days
B) several weeks
C) several years
D) several thousand years
E) hundreds of thousands of years
Answer: D
18) About how many galaxies are there in the observable universe?
A) roughly (within about a factor of 10) the same as the number of stars in our galaxy
B) a few dozen
C) a few thousand
D) about as many as the number of grains of sand on all the beaches on Earth
E) an infinite number
Answer: A
19) If you represented each star by a grain of sand, about how much sand would it take to
represent all the stars in the observable universe?
A) all the sand in a typical playground sandlot
B) all the sand on Miami Beach
C) all the sand on the beaches of California
D) one cubic meter of sand
E) all the sand on all the beaches on Earth
Answer: E
20) Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In that
case
A) we are seeing Galaxy 1 as it looked at an earlier time in the history of the universe than
Galaxy 2.
B) we can't say anything about these galaxies except for their distances.
C) we are seeing Galaxy 1 as it looked at a later time in the history of the universe than Galaxy 2.
Answer: A
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