# OpenStax Astronomy/Test 2 Study guide
## Astronomy midterm Test 2 Study Guide

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### Astronomy midterm Test 2 Study Guide-v1s1

1. At noon a waning gibbous moon would be}
    ___ a) nadir
    ___ b) high in western sky
    ___ c) overhead
    ___ d) western horizon
    ___ e) below the western horizon
2. At 9am a waxing crescent moon would be}
    ___ a) eastern horizon
    ___ b) high in eastern sky
    ___ c) below the western horizon
    ___ d) overhead
    ___ e) nadir
3. At 6pm a waxing crescent moon would be}
    ___ a) eastern horizon
    ___ b) overhead
    ___ c) western horizon
    ___ d) high in western sky
    ___ e) nadir
4. At 9pm a full moon would be}
    ___ a) below the western horizon
    ___ b) eastern horizon
    ___ c) overhead
    ___ d) high in eastern sky
    ___ e) nadir
5. At midnight a waning gibbous moon would be}
    ___ a) below the western horizon
    ___ b) high in western sky
    ___ c) eastern horizon
    ___ d) western horizon
    ___ e) high in eastern sky
6. At 9pm a third quarter moon would be}
    ___ a) high in eastern sky
    ___ b) below the western horizon
    ___ c) high in western sky
    ___ d) below the eastern horizon
    ___ e) nadir
7. At 9am a new moon would be}
    ___ a) below the western horizon
    ___ b) high in western sky
    ___ c) eastern horizon
    ___ d) high in eastern sky
    ___ e) overhead
8. At 6pm a waning crescent moon would be}
    ___ a) below the eastern horizon
    ___ b) western horizon
    ___ c) eastern horizon
    ___ d) nadir
    ___ e) below the western horizon
9. At 3pm a full moon would be}
    ___ a) high in eastern sky
    ___ b) below the western horizon
    ___ c) western horizon
    ___ d) nadir
    ___ e) below the eastern horizon
10. At 6pm a waxing gibbous moon would be}
    ___ a) eastern horizon
    ___ b) high in eastern sky
    ___ c) below the western horizon
    ___ d) nadir
    ___ e) western horizon
11. ____ motion is in the usual direction, and _______ is motion that has temporarily reversed itself.
    ___ a) elliptical; retrograde
    ___ b) direct; retrograde
    ___ c) indirect; direct
    ___ d) direct; elliptical
    ___ e) retrograde; direct
12. Under what conditions would a planet not seem to rise in the east and set in the west?
    ___ a) if the observer is below the equator
    ___ b) if the observer is near the north or south poles
    ___ c) if the planet is in retrograde motion
    ___ d) if the planet is in elliptical motion
    ___ e) if the planet is in direct motion
13. When the faster moving Earth overtakes a slower planet outside Earth's orbit
    ___ a) all of these are true
    ___ b) tidal forces can be observed on the planet
    ___ c) retrograde motion occurs
    ___ d) tidal forces can be observed on Earth
    ___ e) two of these are true
14. Which planet spends more days in a given retrograde?
    ___ a) Mars
    ___ b) Saturn
    ___ c) Earth
    ___ d) They are all equal
    ___ e) It depends on the season
15. Which planet has more days between two consecutive retrogrades?
    ___ a) Mars
    ___ b) It depends on the season
    ___ c) Earth
    ___ d) Saturn
    ___ e) They are all equal
16. A planet that is very, very far from the Sun would be in retrograde for approximately ___ months.
    ___ a) 24
    ___ b) 6
    ___ c) 12
    ___ d) 1
    ___ e) 3
17. If a planet that is very, very far from the Sun begins a retrograde, how many months must pass before it begins the next retrograde?
    ___ a) 3
    ___ b) 6
    ___ c) 1
    ___ d) 24
    ___ e) 12
18. Planet comes from the Greek word for 'wanderer'.
    ___ a) true
    ___ b) false
19. We know that Galileo saw Neptune, but is not credited with its discovery because
    ___ a) he never published his drawing
    ___ b) he thought it was a moon of Saturn
    ___ c) none of these are true
    ___ d) it was in a transition between retrograde and direct motion
    ___ e) it was too faint to be worth drawing
20. Kepler began his career as a teacher of
    ___ a) philosophy
    ___ b) history
    ___ c) astronomy
    ___ d) mathematics
    ___ e) theology
21. Kepler is also known for his improvements to
    ___ a) Ptolemy's star charts
    ___ b) the telescope
    ___ c) a perpetual motion machine
    ___ d) translations of the Bible
    ___ e) the abacus
22. In Kepler's era, astronomy was usually considered a part of natural philosophy
    ___ a) true
    ___ b) false
23. In Kepler's era, astronomy was usually considered a part of mathematics
    ___ a) true
    ___ b) false
24. In Kepler's era, astronomy closely linked to astrology
    ___ a) true
    ___ b) false
25. In Kepler's era, physics (how and why things moved) was usually considered a part of natural philosophy
    ___ a) true
    ___ b) false
26. Kepler incorporated religious arguments and reasoning into his work
    ___ a) true
    ___ b) false
27. Kepler avoided religious arguments and reasoning in his work
    ___ a) true
    ___ b) false
28. How would one describe the status of Kepler's family when he was a child?
    ___ a) neither wealthy nor of noble birth
    ___ b) his father and grandfather were scientists
    ___ c) wealth and of noble birth
    ___ d) of noble birth, but in poverty
    ___ e) wealthy but not of noble birth
29. As a child, Kepler's interest in astronomy grew as a result of
    ___ a) a lunar eclipse
    ___ b) a comet
    ___ c) a solar eclipse
    ___ d) two of these
    ___ e) watching his uncle make a telescope
30. When Kepler's studies at the university were over, what he really wanted to do was
    ___ a) work with Newton
    ___ b) become a minister
    ___ c) visit Rome
    ___ d) visit Athens
    ___ e) work with Tycho
31. Which of the following is NOT associated with Kepler's Laws
    ___ a) planets farther from the Sun have longer orbital periods.
    ___ b) planets speed up as they approach the sun
    ___ c) elliptical paths for the planets
    ___ d) circular motions with epicycles
    ___ e) Earth orbits the sun
32. As a planet orbits the Sun, the Sun is situated at one focal point of the ellipse
    ___ a) true
    ___ b) false
33. As a planet orbits the Sun, the Sun is situated midway between the two focal points of the ellipse
    ___ a) true
    ___ b) false
34. Newton was able to use the motion of the Moon to calculate the universal constant of gravity, G
    ___ a) true
    ___ b) false
35. The force of (gravitational) attraction between you and a friend is small because neither of you possess significant mass
    ___ a) true
    ___ b) false
36. Cavendish finally measured G by carefully weighing the force between
    ___ a) Sun and Moon
    ___ b) two lead balls
    ___ c) Jupiter and moons
    ___ d) Earth and Sun
    ___ e) Earth and Moon
    ___ a) meander
    ___ b) rille
    ___ c) scarp
    ___ d) antipodal
    ___ e) propodal
38. Antipodal to Caloris Basin is
    ___ a) a scarp
    ___ b) a silicon deposits
    ___ c) a water deposits
    ___ d) an iron/nickel deposit
    ___ e) weird terrain
39. A volatile is a substance that
    ___ a) reacts violently with acids
    ___ b) reacts violently with water
    ___ c) melts or evaporates at low temperature
    ___ d) melts or evaporates at high temperature
    ___ e) reacts violently with oxygen
40. The four smaller inner planets, Mercury, Venus, Earth and Mars, also called the terrestrial planets, are primarily composed of ___ and ___.
    ___ a) carbon and oxygen
    ___ b) ice and gas
    ___ c) ice and rock
    ___ d) ice and water
    ___ e) metal and rock
41. If the universe is mostly hydrogen, why aren't terrestrial planets made of mostly hydrogen?
    ___ a) These planets lie inside the frost line for hydrogen
    ___ b) tidal forces from the Sun prevented accretion
    ___ c) tidal forces between the terrestrial planets prevented accretion
    ___ d) tidal forces from Jupiter prevented accretion
    ___ e) thermonuclear fusion in the protosun turned the hydrogen into helium
42. Mercury's atmosphere consists mostly of
    ___ a) oxygen
    ___ b) carbon dioxide
    ___ c) helium
    ___ d) hydrogen
    ___ e) nitrogen
43. In what sequence did Mercury's weird terrain and Caloris basin form?
    ___ a) The were formed at exactly the same time
    ___ b) The weird terrain was formed approximately 2 billions years before the Caloris basin
    ___ c) The weird terrain was formed almost immediately after the Caloris basin
    ___ d) The weird terrain was formed approximately 2 billions years after the Caloris basin
    ___ e) The weird terrain was formed a few millions years after the Caloris basin
44. Very far from the sun, the heliosphere
    ___ a) reverses direction
    ___ b) never ends
    ___ c) becomes the magnetosphere
    ___ d) becomes weaker than the interstellar wind
    ___ e) spins in the opposite direction
45. A volatile is a substance that
    ___ a) reacts violently with oxygen
    ___ b) melts or evaporates at low temperature
    ___ c) reacts violently with water
    ___ d) reacts violently with acids
    ___ e) melts or evaporates at high temperature
46. All planets lie within a nearly flat disc called the __________ plane
    ___ a) interstellar
    ___ b) retrograde
    ___ c) fissile
    ___ d) ecliptic
    ___ e) angular
47. The AU is
    ___ a) the most distant Kuiper object from the Sun
    ___ b) the distance from the Sun to Earth
    ___ c) a measure of the brightness of a planet
    ___ d) the distance from Earth to the Moon
    ___ e) the size of Oort's cloud
48. The Sun and Earth are about
    ___ a) 50 billion years old
    ___ b) 500 million years old
    ___ c) 5 million years old
    ___ d) 5 billion years old
    ___ e) 50 million years old
49. The universe is about
    ___ a) 15 million years old
    ___ b) 15 billion years old
    ___ c) 150 million years old
    ___ d) 1.5 billion years old
    ___ e) 150 billion years old
50. Roughly how much bigger is a gas planet than a terrestrial planet?
    ___ a) 100
    ___ b) 10
    ___ c) 3
    ___ d) 30
    ___ e) 300
51. Roughly how much bigger is a the Sun than a gas planet?
    ___ a) 10
    ___ b) 3
    ___ c) 100
    ___ d) 300
    ___ e) 30
52. According to Wikipedia, if all the mass of the asteroid belt were combined to one object, it's mass would _______ times less than Earth's mass.
    ___ a) 10,000
    ___ b) 1
    ___ c) 10
    ___ d) 100
    ___ e) 1,000
    ___ a) Oort Cloude
    ___ b) magnetic sun's magnetic field
    ___ c) ecliptic plane
    ___ d) Kuiper belt
    ___ e) Van Allen belt
54. In planetary science, the frost line refers to a distance away from
    ___ a) the south pole of a planet
    ___ b) either pole of a planet
    ___ c) ecliptic plane
    ___ d) the north pole of a planet
    ___ e) the star in the middle
55. Oort's cloud was hypothesized to explain the source of
    ___ a) comets
    ___ b) water inside the frost line
    ___ c) asteroids
    ___ d) planets
    ___ e) water outside the frost line
56. According to Wikipedia _______ and ______ are referred to as volatiles.
    ___ a) ices and gasses
    ___ b) acids and bases
    ___ c) planets and moons
    ___ d) asteroids and terrestrial planets
    ___ e) electrons and protons
57. Which of the following list is properly ranked, starting with objects closest to the Sun?
    ___ a) Asteroid belt, Oort's cloud, Kuiper belt
    ___ b) Kuiper belt, Asteroid belt, Oort's cloud
    ___ c) Oort's cloud, Asteroid belt, Kuiper belt
    ___ d) Asteroid belt, Kuiper belt, Oort's cloud
    ___ e) Kuiper belt, Oort's cloud, Asteroid belt
58. When the sun turns into a red giant,
    ___ a) surface temperature decreases; energy output decreases
    ___ b) surface temperature increases; energy output increases
    ___ c) surface temperature increases; energy output decreases
    ___ d) surface temperature decreases; energy output increases
    ___ e) The sun will not turn into a red giant
59. In astrophysics, what is accretion?
    ___ a) the increase in temperature and pressure of a star as it collapses from its own gravity
    ___ b) the condensation of volatiles as a gas cools
    ___ c) the growth of a massive object by gravitationally attracting more matter
    ___ d) the growth in size of a massive star as its outer atmosphere expands
    ___ e) the growth of a comet's tail as it comes close to the Sun
60. Dwarf planets are defined as objects orbiting the Sun and smaller than planets, that?
    ___ a) lie in the asteroid belt
    ___ b) possess an atmosphere
    ___ c) lack an atmosphere
    ___ d) are too far from the Sun to be planets
    ___ e) have been rounded by their own gravity
61. Dwarf planets have no natural satellites,
    ___ a) true
    ___ b) false
62. Pluto is classified as
    ___ a) a dwarf planet and a trans-Neptunian object.
    ___ b) an asteroid belt object
    ___ c) a natural satellite of Uranus
    ___ d) a natural satellite of Neptune
    ___ e) a dwarf planet with no natural satellites
63. How many of the outer planets have rings?
    ___ a) 4
    ___ b) 1
    ___ c) 2
    ___ d) 3
64. Currently there are 7 billion people on Earth, if that ever increases to 10 billion people, for every person on Earth there will be ____ stars in the Milky Way galaxy.
    ___ a) 2000
    ___ b) 200
    ___ c) 20
    ___ d) 2
65. The revolution of Haley's comet around the Sun is nearly circular.
    ___ a) true
    ___ b) false
66. The revolution of Haley's comet around the Sun is opposite that of the 8 planets.
    ___ a) true
    ___ b) false
67. The frost line is situated approximately
    ___ a) 10 times as far from the Sun as the Earth is from the Sun
    ___ b) 5 times as far from the Earth as the Earth's surface is from its center
    ___ c) 5 times as far from the Sun as the Earth is from the Sun
    ___ d) 10 times as far from the Earth as the Earth's surface is from its center

#### Key to Astronomy midterm Test 2 Study Guide-v1s1

1. At noon a waning gibbous moon would be}
       - a) nadir
       - b) high in western sky
       - c) overhead
       - d) western horizon
       + e) below the western horizon
2. At 9am a waxing crescent moon would be}
       + a) eastern horizon
       - b) high in eastern sky
       - c) below the western horizon
       - d) overhead
       - e) nadir
3. At 6pm a waxing crescent moon would be}
       - a) eastern horizon
       - b) overhead
       - c) western horizon
       + d) high in western sky
       - e) nadir
4. At 9pm a full moon would be}
       - a) below the western horizon
       - b) eastern horizon
       - c) overhead
       + d) high in eastern sky
       - e) nadir
5. At midnight a waning gibbous moon would be}
       - a) below the western horizon
       - b) high in western sky
       - c) eastern horizon
       - d) western horizon
       + e) high in eastern sky
6. At 9pm a third quarter moon would be}
       - a) high in eastern sky
       - b) below the western horizon
       - c) high in western sky
       + d) below the eastern horizon
       - e) nadir
7. At 9am a new moon would be}
       - a) below the western horizon
       - b) high in western sky
       - c) eastern horizon
       + d) high in eastern sky
       - e) overhead
8. At 6pm a waning crescent moon would be}
       - a) below the eastern horizon
       - b) western horizon
       - c) eastern horizon
       - d) nadir
       + e) below the western horizon
9. At 3pm a full moon would be}
       - a) high in eastern sky
       - b) below the western horizon
       - c) western horizon
       - d) nadir
       + e) below the eastern horizon
10. At 6pm a waxing gibbous moon would be}
       - a) eastern horizon
       + b) high in eastern sky
       - c) below the western horizon
       - d) nadir
       - e) western horizon
11. ____ motion is in the usual direction, and _______ is motion that has temporarily reversed itself.
       - a) elliptical; retrograde
       + b) direct; retrograde
       - c) indirect; direct
       - d) direct; elliptical
       - e) retrograde; direct
12. Under what conditions would a planet not seem to rise in the east and set in the west?
       - a) if the observer is below the equator
       + b) if the observer is near the north or south poles
       - c) if the planet is in retrograde motion
       - d) if the planet is in elliptical motion
       - e) if the planet is in direct motion
13. When the faster moving Earth overtakes a slower planet outside Earth's orbit
       - a) all of these are true
       - b) tidal forces can be observed on the planet
       + c) retrograde motion occurs
       - d) tidal forces can be observed on Earth
       - e) two of these are true
14. Which planet spends more days in a given retrograde?
       - a) Mars
       + b) Saturn
       - c) Earth
       - d) They are all equal
       - e) It depends on the season
15. Which planet has more days between two consecutive retrogrades?
       + a) Mars
       - b) It depends on the season
       - c) Earth
       - d) Saturn
       - e) They are all equal
16. A planet that is very, very far from the Sun would be in retrograde for approximately ___ months.
       - a) 24
       + b) 6
       - c) 12
       - d) 1
       - e) 3
17. If a planet that is very, very far from the Sun begins a retrograde, how many months must pass before it begins the next retrograde?
       - a) 3
       - b) 6
       - c) 1
       - d) 24
       + e) 12
18. Planet comes from the Greek word for 'wanderer'.
       + a) true
       - b) false
19. We know that Galileo saw Neptune, but is not credited with its discovery because
       - a) he never published his drawing
       - b) he thought it was a moon of Saturn
       - c) none of these are true
       + d) it was in a transition between retrograde and direct motion
       - e) it was too faint to be worth drawing
20. Kepler began his career as a teacher of
       - a) philosophy
       - b) history
       - c) astronomy
       + d) mathematics
       - e) theology
21. Kepler is also known for his improvements to
       - a) Ptolemy's star charts
       + b) the telescope
       - c) a perpetual motion machine
       - d) translations of the Bible
       - e) the abacus
22. In Kepler's era, astronomy was usually considered a part of natural philosophy
       - a) true
       + b) false
23. In Kepler's era, astronomy was usually considered a part of mathematics
       + a) true
       - b) false
24. In Kepler's era, astronomy closely linked to astrology
       + a) true
       - b) false
25. In Kepler's era, physics (how and why things moved) was usually considered a part of natural philosophy
       + a) true
       - b) false
26. Kepler incorporated religious arguments and reasoning into his work
       + a) true
       - b) false
27. Kepler avoided religious arguments and reasoning in his work
       - a) true
       + b) false
28. How would one describe the status of Kepler's family when he was a child?
       - a) neither wealthy nor of noble birth
       - b) his father and grandfather were scientists
       - c) wealth and of noble birth
       + d) of noble birth, but in poverty
       - e) wealthy but not of noble birth
29. As a child, Kepler's interest in astronomy grew as a result of
       - a) a lunar eclipse
       - b) a comet
       - c) a solar eclipse
       + d) two of these
       - e) watching his uncle make a telescope
30. When Kepler's studies at the university were over, what he really wanted to do was
       - a) work with Newton
       + b) become a minister
       - c) visit Rome
       - d) visit Athens
       - e) work with Tycho
31. Which of the following is NOT associated with Kepler's Laws
       - a) planets farther from the Sun have longer orbital periods.
       - b) planets speed up as they approach the sun
       - c) elliptical paths for the planets
       + d) circular motions with epicycles
       - e) Earth orbits the sun
32. As a planet orbits the Sun, the Sun is situated at one focal point of the ellipse
       + a) true
       - b) false
33. As a planet orbits the Sun, the Sun is situated midway between the two focal points of the ellipse
       - a) true
       + b) false
34. Newton was able to use the motion of the Moon to calculate the universal constant of gravity, G
       - a) true
       + b) false
35. The force of (gravitational) attraction between you and a friend is small because neither of you possess significant mass
       + a) true
       - b) false
36. Cavendish finally measured G by carefully weighing the force between
       - a) Sun and Moon
       + b) two lead balls
       - c) Jupiter and moons
       - d) Earth and Sun
       - e) Earth and Moon
       - a) meander
       - b) rille
       + c) scarp
       - d) antipodal
       - e) propodal
38. Antipodal to Caloris Basin is
       - a) a scarp
       - b) a silicon deposits
       - c) a water deposits
       - d) an iron/nickel deposit
       + e) weird terrain
39. A volatile is a substance that
       - a) reacts violently with acids
       - b) reacts violently with water
       + c) melts or evaporates at low temperature
       - d) melts or evaporates at high temperature
       - e) reacts violently with oxygen
40. The four smaller inner planets, Mercury, Venus, Earth and Mars, also called the terrestrial planets, are primarily composed of ___ and ___.
       - a) carbon and oxygen
       - b) ice and gas
       - c) ice and rock
       - d) ice and water
       + e) metal and rock
41. If the universe is mostly hydrogen, why aren't terrestrial planets made of mostly hydrogen?
       - a) These planets lie inside the frost line for hydrogen
       - b) tidal forces from the Sun prevented accretion
       - c) tidal forces between the terrestrial planets prevented accretion
       - d) tidal forces from Jupiter prevented accretion
       + e) thermonuclear fusion in the protosun turned the hydrogen into helium
42. Mercury's atmosphere consists mostly of
       - a) oxygen
       - b) carbon dioxide
       - c) helium
       + d) hydrogen
       - e) nitrogen
43. In what sequence did Mercury's weird terrain and Caloris basin form?
       - a) The were formed at exactly the same time
       - b) The weird terrain was formed approximately 2 billions years before the Caloris basin
       + c) The weird terrain was formed almost immediately after the Caloris basin
       - d) The weird terrain was formed approximately 2 billions years after the Caloris basin
       - e) The weird terrain was formed a few millions years after the Caloris basin
44. Very far from the sun, the heliosphere
       - a) reverses direction
       - b) never ends
       - c) becomes the magnetosphere
       + d) becomes weaker than the interstellar wind
       - e) spins in the opposite direction
45. A volatile is a substance that
       - a) reacts violently with oxygen
       + b) melts or evaporates at low temperature
       - c) reacts violently with water
       - d) reacts violently with acids
       - e) melts or evaporates at high temperature
46. All planets lie within a nearly flat disc called the __________ plane
       - a) interstellar
       - b) retrograde
       - c) fissile
       + d) ecliptic
       - e) angular
47. The AU is
       - a) the most distant Kuiper object from the Sun
       + b) the distance from the Sun to Earth
       - c) a measure of the brightness of a planet
       - d) the distance from Earth to the Moon
       - e) the size of Oort's cloud
48. The Sun and Earth are about
       - a) 50 billion years old
       - b) 500 million years old
       - c) 5 million years old
       + d) 5 billion years old
       - e) 50 million years old
49. The universe is about
       - a) 15 million years old
       + b) 15 billion years old
       - c) 150 million years old
       - d) 1.5 billion years old
       - e) 150 billion years old
50. Roughly how much bigger is a gas planet than a terrestrial planet?
       - a) 100
       + b) 10
       - c) 3
       - d) 30
       - e) 300
51. Roughly how much bigger is a the Sun than a gas planet?
       + a) 10
       - b) 3
       - c) 100
       - d) 300
       - e) 30
52. According to Wikipedia, if all the mass of the asteroid belt were combined to one object, it's mass would _______ times less than Earth's mass.
       - a) 10,000
       - b) 1
       - c) 10
       - d) 100
       + e) 1,000
       - a) Oort Cloude
       - b) magnetic sun's magnetic field
       + c) ecliptic plane
       - d) Kuiper belt
       - e) Van Allen belt
54. In planetary science, the frost line refers to a distance away from
       - a) the south pole of a planet
       - b) either pole of a planet
       - c) ecliptic plane
       - d) the north pole of a planet
       + e) the star in the middle
55. Oort's cloud was hypothesized to explain the source of
       + a) comets
       - b) water inside the frost line
       - c) asteroids
       - d) planets
       - e) water outside the frost line
56. According to Wikipedia _______ and ______ are referred to as volatiles.
       + a) ices and gasses
       - b) acids and bases
       - c) planets and moons
       - d) asteroids and terrestrial planets
       - e) electrons and protons
57. Which of the following list is properly ranked, starting with objects closest to the Sun?
       - a) Asteroid belt, Oort's cloud, Kuiper belt
       - b) Kuiper belt, Asteroid belt, Oort's cloud
       - c) Oort's cloud, Asteroid belt, Kuiper belt
       + d) Asteroid belt, Kuiper belt, Oort's cloud
       - e) Kuiper belt, Oort's cloud, Asteroid belt
58. When the sun turns into a red giant,
       - a) surface temperature decreases; energy output decreases
       - b) surface temperature increases; energy output increases
       - c) surface temperature increases; energy output decreases
       + d) surface temperature decreases; energy output increases
       - e) The sun will not turn into a red giant
59. In astrophysics, what is accretion?
       - a) the increase in temperature and pressure of a star as it collapses from its own gravity
       - b) the condensation of volatiles as a gas cools
       + c) the growth of a massive object by gravitationally attracting more matter
       - d) the growth in size of a massive star as its outer atmosphere expands
       - e) the growth of a comet's tail as it comes close to the Sun
60. Dwarf planets are defined as objects orbiting the Sun and smaller than planets, that?
       - a) lie in the asteroid belt
       - b) possess an atmosphere
       - c) lack an atmosphere
       - d) are too far from the Sun to be planets
       + e) have been rounded by their own gravity
61. Dwarf planets have no natural satellites,
       - a) true
       + b) false
62. Pluto is classified as
       + a) a dwarf planet and a trans-Neptunian object.
       - b) an asteroid belt object
       - c) a natural satellite of Uranus
       - d) a natural satellite of Neptune
       - e) a dwarf planet with no natural satellites
63. How many of the outer planets have rings?
       + a) 4
       - b) 1
       - c) 2
       - d) 3
64. Currently there are 7 billion people on Earth, if that ever increases to 10 billion people, for every person on Earth there will be ____ stars in the Milky Way galaxy.
       - a) 2000
       - b) 200
       + c) 20
       - d) 2
65. The revolution of Haley's comet around the Sun is nearly circular.
       - a) true
       + b) false
66. The revolution of Haley's comet around the Sun is opposite that of the 8 planets.
       + a) true
       - b) false
67. The frost line is situated approximately
       - a) 10 times as far from the Sun as the Earth is from the Sun
       - b) 5 times as far from the Earth as the Earth's surface is from its center
       + c) 5 times as far from the Sun as the Earth is from the Sun
       - d) 10 times as far from the Earth as the Earth's surface is from its center

   ##### Attribution (for quiz questions) under CC-by-SA license

    http://en.wikiversity.org/w/index.php?title=Astronomy_college_course/Lunar_Phases/Quiz(advanced)&oldid=1284517
    http://en.wikiversity.org/w/index.php?title=Astronomy_college_course/Apparent_regrograde_motion/Quiz01&oldid=1284510
    http://en.wikiversity.org/w/index.php?title=Astronomy_college_course/Kepler/Quiz01&oldid=1284523
    http://en.wikiversity.org/w/index.php?title=Astronomy_college_course/Mercury/questions&oldid=1388427
    http://en.wikiversity.org/w/index.php?title=Astronomy_college_course/Solar_system/Quiz&oldid=1388382
    http://en.wikiversity.org/w/index.php?title=Astronomy_college_course/Solar_system/Quiz_2&oldid=1298068

   ##### Study guide

    http://en.wikiversity.org/w/index.php?title=Astronomy_college_course/Lunar_Phases&oldid=1190185
    http://en.wikipedia.org/w/index.php?title=User:Guy_vandegrift/Astronomy_college_course/Apparent_retrograde_motion&oldid=615635101
    http://en.wikipedia.org/w/index.php?title=User:Guy_vandegrift/Astronomy_college_course/Kepler&oldid=615571371
    http://en.wikiversity.org/w/index.php?title=Astronomy_college_course/Mercury&oldid=1381954
    http://en.wikipedia.org/w/index.php?title=Solar_System&oldid=589452802