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10) Do you think it is possible that a 10-solar-mass main-sequence star could harbor an advanced civilization? Explain your reasoning. 11) Do you think it is possible that a 1.5-solar-mass red giant could harbor an advanced civilization? Explain your reasoning. 12) Lithium, beryllium, and boron are elements with atomic number 3, 4,.
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12.7   MasteringAstronomy Concept Quiz 1) Which two processes can generate energy to help a star maintain its internal thermal pressure? A) Nuclear fusion and gravitational contraction B) Nuclear fusion and nuclear fission C) Nuclear fusion and supernova D) Nuclear fission and supernova 2) Our Sun is considered to be a ________. A) low-mass star B) intermediate-mass star C) high-mass.
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12.2   True/False Questions 1) Photographs of many young stars show long jets of material apparently being ejected from their poles. 2) Although some photographs show what looks like jets of material near many young stars, we now know that these "jets" actually represent gas from the surrounding nebula that is falling onto.
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12.4   Short Answer Questions 1) Briefly describe how a star forms. 2) Explain how some stars form in binary systems. A.H fusion by the proton-proton chain B.H fusion by the CNO cycle C.helium fusion D.matter-antimatter annihilation E.gravitational contraction 3) Which method of energy generation is used by the Sun today? 4) Which one provided the energy that made the.
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13.5   Questions Based on MasteringAstronomy Tutorials 1) Imagine what would happen if Jupiter was suddenly replaced by a black hole with the same mass as Jupiter. A) The other planets would slowly be pulled into Jupiter, but the Sun would be unaffected. B) The orbits of the solar system would be unaffected (including.
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11.5   Questions Based on MasteringAstronomy Tutorials 1) Which of the following stars has a spectrum that peaks at the highest frequency? A) A yellow star B) A red star C) A blue star 2) A scientist claims that all red main sequence stars are 1 billion years old. Which of the following, if true, would.
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14.2   True/False Questions 1) Open clusters and young stars are generally found only in the disk of the Milky Way and not in the halo. 2) We can see most of the Milky Way with visible light. 3) Observing our galaxy at radio wavelengths allows us to see through the dust in the.
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13.4   Short Answer Questions 1) Could our Sun ever undergo a nova or a white-dwarf supernova event? Why or why not? 2) Why does the size of a white dwarf decrease with increasing mass? 3) Briefly describe how a nova event occurs. 4) Why do white-dwarf supernovae all have the same maximum luminosity? 5) What.
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11) Pulsars are thought to be ________. A) accreting white dwarfs B) rapidly rotating neutron stars C) unstable high-mass stars D) accreting black holes 12) How is an X-ray burst (in an X-ray binary system) similar to a nova? A) Both involve explosions on the surface of stellar corpse. B) Both typically recur every few hours to.
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11) What elements do astronomers consider heavy elements? A) elements that are heavier than iron B) elements that are heavier than carbon C) elements that are heavier than hydrogen D) elements that are heavier than uranium E) all elements besides hydrogen and helium 12) Where are most heavy elements made? A) In the interstellar medium B) In stars.
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15.1   Multiple Choice Questions 1) Based on counting the number of galaxies in a small patch of the sky and multiplying by the number of such patches needed to cover the entire sky, the total number of galaxies in the observable universe is estimated to be approximately A) 100 million. B) 1 billion. C).
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14.6   MasteringAstronomy Reading Quiz 1) How does the diameter of the disk of Milky Way Galaxy compare to its thickness? A) The diameter is about 100 times as great as the thickness. B) The diameter and thickness are roughly equal. C) The diameter is about 10 times as great as the thickness. D) The diameter.
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21) Which of the following sequences correctly describes the stages of life for a low-mass star? A) red giant, protostar, main-sequence, white dwarf B) white dwarf, main-sequence, red giant, protostar C) protostar, red giant, main-sequence, white dwarf D) protostar, main-sequence, white dwarf, red giant E) protostar, main-sequence, red giant, white dwarf 22) Compared to the star.
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12.6   MasteringAstronomy Reading Quiz 1) The interstellar clouds called molecular clouds are ________. A) the cool clouds in which stars form B) the clouds in which elements such as carbon, nitrogen, and oxygen are made C) clouds that are made mostly of complex molecules such as carbon dioxide and sulfur dioxide D) the hot clouds.
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11) Why are elements with even numbers of protons more abundant, on average, than elements with odd numbers of protons? A) Because elements are mainly made in fusion reactions with hydrogen nuclei B) Because when elements split in a fission reaction, they prefer to split with all the protons paired C) Because elements.
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51) Which of the following is evidence for supermassive black holes in active galaxies? A) the discovery of powerful jets coming from a compact core B) rapid changes in the luminosity of the galaxy nucleus C) quasars emit approximately equal power at all wavelengths from infrared to gamma rays D) the very high speeds.
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14.5   Questions Based on MasteringAstronomy Tutorials 1) On a dark summer night in the northern hemisphere, we can see the Milky Way but we can't see the center of the Milky Way. Why not? A) There are no stars in the center of the Milky Way, just a supermassive black hole. B) The.
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13.1   Multiple Choice Questions 1) Degeneracy pressure stops the crush of gravity in all the following except: A) a brown dwarf. B) a white dwarf. C) a neutron star. D) a very massive main-sequence star. E) the central core of the Sun after hydrogen fusion ceases but before helium fusion begins. 2) A white dwarf is A) the.
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11) The primary way that we observe the atomic hydrogen that makes up most of the interstellar gas in the Milky Way is with ________. A) radio telescopes observing at a wavelength of 21 centimeters B) ground-based visible-light telescopes C) space-based ultraviolet telescopes D) X-ray telescopes 12) Which of the following molecules is the most.
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11.7   MasteringAstronomy Concept Quiz 1) All stars are born with the same basic composition, yet stars can look quite different from one another. Which two factors primarily determine the characteristics of a star? A) Its mass and its stage of life B) Its apparent brightness and its distance C) Its age and its location.
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21) What is the most abundant molecule in interstellar clouds besides molecular hydrogen? A) molecular helium B) water C) carbon monoxide D) ammonia E) methane 22) The image of our galaxy in radio emission from carbon monoxide maps the distribution of molecular clouds. Which of the following would give a similar picture of our galaxy? A) 21-cm-line.
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13.2   True/False Questions 1) Brown dwarfs, white dwarfs, and neutrons stars are all kept from collapsing by degeneracy pressure. 2) The maximum mass for a white dwarf is 1.4 solar masses. 3) More massive white dwarfs are smaller than less massive white dwarfs 4) There is no upper limit to the mass of a.
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13.7   MasteringAstronomy Concept Quiz 1) Which of the following statements about degeneracy pressure is not true? A) Degeneracy pressure can continue to support an object against gravitational collapse even if the object becomes extremely cold. B) Degeneracy pressure arises from a quantum mechanical effect that we don't notice in our daily lives. C) Black.
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14.1   Multiple Choice Questions 1) What is the diameter of the disk of the Milky Way? A) 100 light years B) 1,000 light years C) 10,000 light years D) 100,000 light years E) 1,000,000 light years 2) What is the thickness of the disk of the Milky Way? A) 100 light years B) 1,000 light years C) 10,000 light years D).
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12.5   Questions Based on MasteringAstronomy Tutorials 1) Which type of star spends the shortest time as a main sequence star? A) O star B) M star C) B star D) G star 2) According to this plot, which is the third most abundant element in the universe? A) Hydrogen B) Boron C) Oxygen D) Lithium E) Helium 3) (Use diagram of abundance.
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11) All the following types of objects are found almost exclusively in the disk (rather than the halo) of the Milky Way except ________. A) globular clusters B) young stars C) X-ray binaries D) high-mass, red supergiant stars 12) Red and orange stars are found evenly spread throughout the galactic disk, but blue stars are.
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11.6   MasteringAstronomy Reading Quiz 1) What is the approximate chemical composition (by mass) with which all stars are born? A) Three quarters hydrogen, one quarter helium, no more than 2% heavier elements B) Half hydrogen and half helium C) 98% hydrogen, 2% helium D) 95% hydrogen, 4% helium, no more than 1% heavier elements 2) The.
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13.6   MasteringAstronomy Reading Quiz 1) A white dwarf is ________. A) what most stars become when they die B) a precursor to a black hole C) an early stage of a neutron star D) a brown dwarf that has exhausted its fuel for nuclear fusion 2) A typical white dwarf is ________. A) as massive as the.
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11) Which of the following terms is given to a pair of stars that we can determine are orbiting each other only by measuring their periodic Doppler shifts? A) Spectroscopic binary B) Eclipsing binary C) Visual binary D) Double star 12) The axes on a Hertzsprung-Russell (H-R) diagram represent ________. A) luminosity and surface temperature B) mass.
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11) Most large galaxies in the universe are A) elliptical. B) spiral or lenticular. C) irregular. D) abnormal. 12) Approximately how many stars does a dwarf elliptical galaxy have? A) 1 trillion B) 100 billion C) 10 billion D) less than a billion E) less than a million 13) Which of the following is true about irregular galaxies? A) They are composed.
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