Cosmology Practice Exam
Course Introduction
Cosmology is the scientific study of the origin, evolution, structure, and eventual fate of the universe. This course explores fundamental topics such as the Big Bang theory, cosmic inflation, the large-scale structure of the cosmos, dark matter, dark energy, and the cosmic microwave background. Students will learn about observational evidence supporting current models, the role of galaxies and clusters, and the mathematical foundations underpinning cosmological theories. The course emphasizes the interplay between theoretical predictions and empirical observations, providing a comprehensive understanding of the universe from its earliest moments to its possible ultimate outcomes.
Recommended Textbook
Life in the Universe 4th Edition by Jeffrey O. Bennett
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13 Chapters
1172 Verified Questions
1172 Flashcards
Source URL: https://quizplus.com/study-set/1023
Page 2
Chapter 1: A Universe of Life
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28 Verified Questions
28 Flashcards
Source URL: https://quizplus.com/quiz/20263
Sample Questions
Q1) The ancient view of an Earth-centered geocentric universe suggested that life elsewhere should be
A) common
B) rare
C) this view gives us no clue of the likelihood of life elsewhere
D) at the center of another, parallel universe
Answer: B
Q2) For most of human history it was believed that the Earth was at the center of the universe. This idea is referred to as
A) heliocentric
B) egocentric
C) geocentric
D) stellocentric
Answer: C
Q3) Using current spacecraft, how long would it take to reach the nearest stars?
A) hundreds of thousands of years
B) millions of years
C) only a few years
D) thousands of years
Answer: B
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Chapter 2: The Science of Life in the Universe
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73 Verified Questions
73 Flashcards
Source URL: https://quizplus.com/quiz/20264
Sample Questions
Q1) Careful observations of the sky by ancient cultures served the practical purpose of A) keeping track of time
B) improving night vision
C) religious worship
D) keeping track of the changing position of the Earth around the Sun
Answer: A
Q2) Historical evidence suggests that the methods of modern science were originated by the
A) Mayans
B) Egyptians
C) Greeks
D) Babylonians
Answer: C
Q3) The semi-major axis, a, of an elliptical planetary orbit is equal to the A) width of the ellipse
B) distance between the planet and the Sun at perihelion
C) average distance between the planet and the Sun
D) distance between the planets and the Sun at aphelion
Answer: C
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Page 4
Chapter 3: The Universal Context of Life
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123 Verified Questions
123 Flashcards
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Sample Questions
Q1) Chunks of rock and metal that orbit the Sun but are much smaller than the planets are referred to as
A) comets
B) dwarf planets
C) meteors
D) asteroids
Answer: D
Q2) The nearest star is at a distance of 4.4 light-years. Given that light travels at 300,000 km/s in space, how far away is the nearest star in kilometers (km)?
A) 4.2 10¹³ km
B) 2.7 10¹ km
C) 3.0 10 km
D) 9.5 10¹² km
Answer: A
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Chapter 4: The Habitability of Earth
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149 Verified Questions
149 Flashcards
Source URL: https://quizplus.com/quiz/20266
Sample Questions
Q1) If originally there were X atoms of radioactive isotope present and now there are only X/4 atoms, how many half-lives have elapsed?
A) 1
B) 4
C) 2
D) 3
Q2) Which terrestrial planet(s) have magnetic fields?
A) Earth and Venus
B) Earth only
C) all of them do
D) Earth and Mercury
Q3) Which of the following is a greenhouse gas?
A) carbon dioxide (CO )
B) methane (CH )
C) water vapor (H O)
D) all of these are greenhouse gases
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Chapter 5: The Nature of Life on Earth
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120 Verified Questions
120 Flashcards
Source URL: https://quizplus.com/quiz/20267
Sample Questions
Q1) Energy utilization in living organisms is
A) one of the most basic requirements of life, without which organisms could not maintain order, grow, and reproduce
B) only important for organisms like plants which receive their energy directly from the Sun
C) neither a necessary nor a sufficient condition for life
D) not important for organisms that have adapted to survive extremely low temperatures (psychrophiles)
Q2) All living cells use the molecule adenosine triphosphate (ATP)
A) to carry oxygen into cells
B) to catalyze biochemical reactions
C) as a building block for nucleic acids
D) to store and release energy for biochemical processes
Q3) Abnormal forms of protein molecules called prions have one of the characteristics of living things in that they
A) can replicate themselves by causing other molecules to change
B) actively respond to external changes
C) have very complex structures
D) use sunlight for energy
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Chapter 6: The Origin and Evolution of Life on Earth
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130 Verified Questions
130 Flashcards
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Sample Questions
Q1) One type of early protocell (pre-cells) probably consisted of small droplets of
A) water
B) clay
C) lipids
D) nucleic acids
Q2) What is the main potential concern regarding the creation of artificial life?
A) that they would rapidly evolve and replace existing life on Earth
B) that they would be used by hostile nations to build clone armies
C) that they might be the source of new diseases or toxins for which terrestrial life would have little resistance
D) that they would travel on our robotic space probes and contaminate other planets
Q3) In 1994, fragments of the Comet Shoemaker-Levy 9 were observed to collide with the planet
A) Mars
B) Saturn
C) Jupiter
D) Venus
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Chapter 7: Searching for Life in Our Solar System
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60 Verified Questions
60 Flashcards
Source URL: https://quizplus.com/quiz/20269
Sample Questions
Q1) A common way a robotic spacecraft can be accelerated and have its trajectory changed without the use of any fuel is via
A) a gravitational slingshot from another spacecraft
B) radiation pressure from the Sun
C) the ejection of mass from the probe
D) a gravitational slingshot from another planet
Q2) In searching for life in the solar system, which basic requirement of life is the most fundamental and the one we always look for?
A) the presence of organic matter
B) the presence of an energy source
C) the presence of a liquid medium, most likely water
D) the presence of oxygen
Q3) How does the surface temperature and atmospheric pressure on Venus compare with the Earth?
A) higher temperatures and pressures
B) lower temperatures but higher pressures
C) lower temperatures and pressures
D) higher temperatures but lower pressures
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9
Chapter 8: Mars
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104 Verified Questions
104 Flashcards
Source URL: https://quizplus.com/quiz/20270
Sample Questions
Q1) What evidence supports the hypothesis for a vast, deep ocean which once occupied what is now the northern plains of Mars?
A) many of the largest flood channels appear to have drained into the northern plains
B) geographic features that look like ancient shorelines
C) that the rock along the proposed shoreline is sedimentary rather than volcanic
D) all of these are evidence
Q2) Typically, what color is the Martian sky during in the morning and evenings?
A) green
B) yellow-brown
C) red
D) blue
Q3) The first rover to explore Mars in 1997 was called
A) Opportunity
B) Spirit
C) Sojourner
D) Curiosity
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Chapter 9: Life on Jovian Moons
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80 Verified Questions
80 Flashcards
Source URL: https://quizplus.com/quiz/20271
Sample Questions
Q1) Which of the following would make finding life in an ocean beneath the surface of Ganymede more difficult than finding life in an ocean beneath the surface of Europa?
A) a thicker ice layer above the ocean
B) the presence of high-density forms ice at the bottom of any ocean
C) fewer nutrients transported down from the surface
D) all of these
Q2) Tidal heating is not important for which of the following Galilean moons?
A) Callisto
B) Io
C) Europa
D) Ganymede
Q3) What is the relationship between density and distance for the four Galilean moons of Jupiter?
A) density increases with increasing distance
B) density remains constant with distance
C) density first decreases and then increases with distance
D) density decreases with distance
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Chapter 10: The Nature and Evolution of Habitability
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65 Verified Questions
65 Flashcards
Source URL: https://quizplus.com/quiz/20272
Sample Questions
Q1) According to optimistic estimates, the end of habitability of Earth will come about
A) a few hundred thousand years from now
B) a billion years from now
C) 3 to 4 billion years from now
D) 100 million years from now
Q2) When the Sun ejects its outer layer into space to become a planetary nebula, most likely the
A) Earth will be ejected from the solar system
B) Earth will be destroyed
C) Earth's oceans will freeze solid
D) Earth will experience a runaway greenhouse effect followed by the total loss of its atmosphere
Q3) When the Sun runs out of nuclear fuel and expands to become a red giant, A) the Earth's oceans will freeze solid
B) the Earth will be ejected from the solar system
C) the Earth will be destroyed
D) the Earth will experience a runaway greenhouse effect followed by the total loss of its atmosphere
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12
Chapter 11: Extrasolar Planets: Their Nature and Potential
Habitability
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100 Verified Questions
100 Flashcards
Source URL: https://quizplus.com/quiz/20273
Sample Questions
Q1) The Hertzprung-Russell diagram is a plot of
A) radial velocity against distance
B) apparent brightness against time
C) luminosity against distance
D) luminosity against surface temperature
Q2) M-type stars in our galaxy are
A) fairly common (several percent)
B) the most common type of stars in our galaxy (75% or more)
C) very common, making up about 50% of the total
D) very rare (less than 1%)
Q3) When we measure the mass of a planet using the Doppler shift method, we know that it is mass
A) could well be smaller
B) could be larger or smaller
C) is exactly as measured
D) could well be larger
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13
Chapter 12: The Search for Extraterrestrial Intelligence
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75 Verified Questions
75 Flashcards
Source URL: https://quizplus.com/quiz/20274
Sample Questions
Q1) The factor fn w, in the Drake equation depends on
A) whether a civilization ever develops intelligence
B) whether a planet has any kind of life on its surface right now
C) how technologically advanced civilizations become
D) how long civilizations survive once they have arisen
Q2) Optical SETI is useful for
A) focused communication over short distances and in particular directions
B) communication over wide areas and large distances
C) communication over large distances in directions where interstellar dust is not present
D) communication with civilizations which surround similar stars to our Sun and hence have evolved to see visible radiation
Q3) About 90% of UFO sightings
A) are hoaxes
B) cannot be explained
C) are real sightings of alien craft
D) can be explained by natural phenomena
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14
Chapter 13: Interstellar Travel and the Fermi Paradox
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65 Verified Questions
65 Flashcards
Source URL: https://quizplus.com/quiz/20275
Sample Questions
Q1) The idea that other civilizations are waiting for us to reach a certain technological level before revealing themselves to us is referred to as the
A) conspiracy hypothesis
B) UFO hypothesis
C) sentinel hypothesis
D) zoo hypothesis
Q2) The main practical problem associated with building an interstellar ramjet is
A) making the ship large enough to scoop up enough hydrogen fuel given that the density of hydrogen in space is so low
B) producing enough thrust to accelerate the spacecraft to a high enough speed
C) separating the matter and antimatter fuels from each other
D) receiving enough photon energy to propel the craft
Q3) The New Horizons probe carries what kind of physical time capsule?
A) a small engraved plaque
B) a gold-plated record containing pictures, multilingual greetings and music
C) a DVD containing pictures
D) this probe does not carry a physical time capsule but a message will eventually be uploaded to its computers
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