Planetary Science
Exam Answer Key
Course Introduction
Planetary Science explores the formation, evolution, and current state of planets, moons, and other bodies within our solar system and beyond. This interdisciplinary field integrates concepts from astronomy, geology, atmospheric science, and chemistry to investigate the physical and chemical processes that shape planetary bodies. Students will study topics such as planet and moon formation, planetary interiors, atmospheres, surfaces, and magnetospheres, as well as the search for extraterrestrial life. The course provides an understanding of observation techniques, space mission discoveries, and comparative planetology, equipping learners to interpret current findings and future explorations of planetary systems.
Recommended Textbook
Life in the Universe 3rd Edition by Jeffrey O. Bennett
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12 Chapters
1027 Verified Questions
1027 Flashcards
Source URL: https://quizplus.com/study-set/3825 Page 2
Chapter 2: The Science of Life in the Universe
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60 Verified Questions
60 Flashcards
Source URL: https://quizplus.com/quiz/76322
Sample Questions
Q1) Apparent retrograde motion occurs when a planet appears to
A) be stationary with respect to background stars
B) move eastward with respect to background stars
C) move due north with respect to background stars
D) move westward with respect to background stars
Answer: D
Q2) Scientists always try to
A) be as subjective as possible
B) be as objective as possible
C) disagree with the current paradigm of the time
D) agree with the current paradigm of the time
Answer: B
Q3) Which Greek school of thought believed that both the heavens and the Earth were made of an infinite number of indivisible units made of the elements fire, water, earth, and air?
A) the Aristotelians
B) the xenophanes
C) the atomists
D) the milesians
Answer: C
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Chapter 3: The Universal Context of Life
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110 Verified Questions
110 Flashcards
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Sample Questions
Q1) A distribution of light consisting of dark lines on a continuous background is referred to as
A) a continuous spectrum
B) an emission line spectrum
C) an absorption line spectrum
D) a broad line spectrum
Answer: C
Q2) Many of the extrasolar planetary systems discovered to date are
A) very similar to our own solar system with inner rocky terrestrial planets and outer gaseous jovian planets
B) quite different to our own solar system, many with jovian planets found close to their parent stars
C) similar to our solar system in having inner rocky terrestrial planets but different in having no jovian planets
D) identical to our own with the same number and types of planet as our own solar system
Answer: B
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Chapter 4: The Habitability of Earth
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135 Verified Questions
135 Flashcards
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Sample Questions
Q1) The greenhouse effect is the
A) generation of heat in the outer layer of the Earth's atmosphere due to absorption of short wavelength radiation
B) generation of heat in the ozone layer due to the absorption of ultraviolet radiation
C) release of heat by volcanism along tectonic plate boundaries
D) trapping of infrared radiation from the Earth's surface by greenhouse gases like carbon dioxide, methane, and water
Q2) When a metamorphic rock is eroded and then becomes deposited at the bottom of an ocean it turns into
A) a meteorite
B) an igneous rock
C) a sedimentary rock
D) another metamorphic rock
Q3) The Earth is able to recover from a snowball phase by
A) the gradual melting of snow and ice by solar radiation
B) the gradual build up of heat beneath the snow and ice layer
C) the breaking up of the snow and ice layer by plate tectonics
D) carbon dioxide gradually building up in the atmosphere from volcanism
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Chapter 5: The Nature of Life on Earth
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110 Verified Questions
110 Flashcards
Source URL: https://quizplus.com/quiz/76319
Sample Questions
Q1) A genus is
A) a group of species that are closely related to one another
B) a group of species that are particularly intelligent
C) a group of organisms that look similar
D) groups of organisms that are genetically distinct
Q2) The organisms in which domains of life are unicellular?
A) bacteria only
B) bacteria and archaea
C) archaea and eukarya
D) archaea only
Q3) Recent studies of the biochemistry of cells have shown that prokaryotes are
A) more biochemically related to eukaryotes than previously thought
B) biochemically identical to eukaryotes in every way
C) a biochemically distinct group unrelated to eukaryotes in any way
D) organisms that were transported to Earth from Mars in meteroites
Q4) Which forms of life on Earth show the greatest diversity?
A) insects
B) human beings
C) plants
D) microbes
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Chapter 6: The Origin and Evolution of Life on Earth
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110 Verified Questions
110 Flashcards
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Sample Questions
Q1) Stromatolites are
A) fossils of the first organisms to introduce oxygen into the atmosphere
B) fossils of the first multicellular organisms
C) layers of sediment that once contained colonies of ancient microbes
D) fossils of the first eukaryotes
Q2) How large was the asteroid that hit the Earth 65 million years ago?
A) 50 meters
B) 100 kilometers
C) 10-15 kilometers
D) 1-2 kilometers
Q3) What was NOT an important source of prebiotic molecules (e.g., amino acids) on the early Earth?
A) outgassing by volcanoes
B) molecules produced in the atmosphere by the action of lightning
C) molecules produced by chemical reactions near deep-sea ocean vents
D) molecules transported to the surface by impacts
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Chapter 7: Searching for Life in Our Solar System
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56 Verified Questions
56 Flashcards
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Sample Questions
Q1) Which of the following makes water an ideal solvent for life?
A) water remains liquid over a wide and high range of temperatures
B) ice is less dense than water so when a body of water is cooled, only the surface freezes
C) water is a polar molecule, making it an excellent solvent
D) all of the above
Q2) Even though ethane (C<sub>2</sub>H<sub>6</sub>) has a liquid temperature range almost as wide as water, it is not as good a biological solvent as water because it is a liquid at
A) much higher temperatures which would result in the breakdown of fragile biological molecules
B) very high pressures that are unlikely to be found elsewhere
C) very low pressures that are unlikely to be found elsewhere
D) much lower temperatures which would result in extremely slow metabolic reactions
Q3) The Huygens probe was an example of which kind of spacecraft?
A) orbiter
B) sample return
C) lander
D) flyby
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Page 8
Chapter 8: Mars
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90 Verified Questions
90 Flashcards
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Sample Questions
Q1) The Lowell Observatory, built by Percival Lowell to study Mars and still in operation today, is located in
A) Sunspot, New Mexico
B) Flagstaff, Arizona
C) Mount Wilson, California
D) Amherst, Massachusetts
Q2) Results from the Mars Exploration Rovers Spirit and Opportunity suggest that liquid water
A) has never existed in significant quantities on the surface of Mars
B) was once plentiful on the surface of Mars
C) is only present in the Tharsis region of Mars
D) is present in large quantities beneath the Martian surface today
Q3) The most important geological process occurring on Mars today is
A) water erosion
B) plate tectonics
C) volcanism
D) wind erosion
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Chapter 9: Life on Jovian Moons
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54 Verified Questions
54 Flashcards
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Sample Questions
Q1) The largest Jovian moon Ganymede and Titan are
A) larger than the Earth
B) larger than Mercury but smaller than the Earth
C) larger than the Moon but smaller than Mercury
D) about the same size as Mars
Q2) Chemical disequilibrium inevitably exists near deep-sea volcanic vents, because A) there are unequal concentrations of minerals and water
B) the high-temperature vent water causes water molecules to break down into hydrogen and oxygen
C) mixing between the high-temperature vent water and the surrounding low-temperature ocean water creates conditions in which minerals and water will undergo chemical reactions
D) the high pressures existing at the ocean floor cause chemical reactions between minerals and water
Q3) If Triton has a subsurface ocean, it will most likely consist of
A) water mixed with ammonia, methane, or other melted ices
B) liquid nitrogen
C) liquid ammonia and methane
D) liquid water
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Page 10
Chapter 10: The Nature and Evolution of Habitability
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60 Verified Questions
60 Flashcards
Source URL: https://quizplus.com/quiz/76314
Sample Questions
Q1) According to conservative estimates, the end of habitability of Earth will come about
A) 3 to 4 billion years from now
B) a few hundred thousand years from now
C) 100 million years from now
D) a billion years from now
Q2) The possible habitability of Mars today is mostly determined by
A) the amount of heat it receives from the Sun
B) the composition of its atmosphere
C) the thickness of its atmosphere
D) geological conditions existing beneath its surface
Q3) A star more luminous than our Sun will have a habitable zone that is
A) narrower and farther from the star than the habitable zone of the Sun
B) narrower and closer to the star than the habitable zone of the Sun
C) wider and farther from the star than the habitable zone of the Sun
D) wider and closer to the star than the habitable zone of the Sun
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Chapter 11: Habitability Outside the Solar System
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100 Verified Questions
100 Flashcards
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Sample Questions
Q1) Brown dwarfs occupy the range of masses between A) white dwarfs and neutron stars
B) giants and supergiants
C) terrestrial and Jovian planets
D) large planets and small stars
Q2) One of the fundamental principles of stellar evolution is that the more massive a star is
A) the more heavy elements it contains
B) the more planets it has around it
C) the faster it evolves
D) the slower it evolves
Q3) Imagine we have a planet identical to Jupiter around another star, with the exception that its orbit is much closer. How would its size compare to Jupiter?
A) it would be the same size
B) it would be larger
C) it would be much smaller
D) it would be slightly smaller
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Chapter 12: The Search for Extraterrestrial Intelligence
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76 Verified Questions
76 Flashcards
Source URL: https://quizplus.com/quiz/76312
Sample Questions
Q1) Visible radiation may be useful for transmitting
A) signals over wide areas towards a number of nearby stars
B) signals to advanced civilizations that never develop radio astronomy
C) focused signals to individual star systems nearby
D) signals to civilizations in neighboring galaxies
Q2) Approximately how soon might we expect an immediate response from a civilization that received the signal we sent to the globular cluster M13 (25,000 light-years away) in 1974?
A) 100,000 years
B) 25,000 years
C) 12,500 years
D) 50,000 years
Q3) How is intelligence defined in the Drake Equation?
A) a civilization that has developed language
B) a civilization willing and able to communicate over interstellar distances
C) a civilization that communicates using telepathy
D) a civilization capable of spaceflight
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Chapter 13: Interstellar Travel and the Fermi Paradox
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66 Verified Questions
66 Flashcards
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Sample Questions
Q1) Which of the following represents a challenge in using antimatter as fuel for an interstellar spacecraft?
A) generating the enormous amount of energy needed to produce it
B) the problem of safely storing it
C) how to make sufficiently large quantities of it
D) all of the above represent significant challenges
Q2) An antihydrogen atom would consist of
A) a proton and a positron
B) a proton and an antielectron
C) an antiproton and a positron
D) an antiproton and an antielectron
Q3) The Project Daedalus starship designed by the British Interplanetary Society in the 1970s was propelled by
A) chemical rockets
B) nuclear fusion reactors
C) nuclear fission reactors
D) the annihilation of matter and antimatter
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