Stars/Evolutions/Quiz

Stellar evolution is a lecture about a specific theory from astrophysics for the origin and accumulated changes of star systems. It is an offering from the radiation astronomy department.

You are free to take this quiz based on stellar evolution at any time.

To improve your score, read and study the lecture, the links contained within, listed under See also, External links, and in the template. This should give you adequate background to get 100 %.

As a "learning by doing" resource, this quiz helps you to assess your knowledge and understanding of the information, and it is a quiz you may take over and over as a learning resource to improve your knowledge, understanding, test-taking skills, and your score.

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To master the information and use only your memory while taking the quiz, try rewriting the information from more familiar points of view, or be creative with association.

Enjoy learning by doing!

Quiz
{Yes or No, Cosmogony is any scientific theory concerning the coming into existence, or origin, of the cosmos or universe, or stars came to be. + Yes - No
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{Piezonuclear reactions associated with fission may include + occurring in inert and non-radioactive elements + high pressure + brittle fracture + solids under compression + low-energy reactions + take place in nuclei with an atomic weight ≤ iron
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{Yes or No, The formation of exponential disks is an outstanding problem in cosmogony. + Yes - No
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{Complete the text: Yarkovsky–O'Keefe–Radzievskii–Paddack (YORP) { torques|torque (i) } lead many objects to { fission (i) } and then re-accrete.
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{Chemical and physical phenomena that may be associated with core formation are + a deficiency of some noble metals in the crust of the Earth + leaching by metallic iron + a liquid Earth + a loss of mechanical energy by conversion to heat + low viscosity - elasticity
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{Yes or No, While fusion may be the primary mechanism by which first generation stars produce energy, repulsion between like nucleons may cause neutron emission from a collapsed core. + Yes - No
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{Which of the following is not a prominent feature associated with solar clouds? - coronal mass ejections - magnetic clouds + rotation - coronal clouds - plasma - magnetic field lines
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{True or False, In the evolution of elements much more material has gone into the even-numbered elements than into those which are odd. + TRUE - FALSE
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{In general there is no proper motion at all in the plage or the surrounding? { plagettes (i) }
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{True or False, "Some prominences break apart and give rise to coronal mass ejections." + TRUE - FALSE
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{It is important to study the stellar populations of nearby galaxies in order to understand the processes of galaxy { evolution (i) }.
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{Complete the text: "When a prominence is viewed from a different perspective so that it is against the { Sun|sun|star (i) } instead of against space, it appears { dark|darker (i) } than the surrounding { background (i) }.
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{True or False, With respect to the core of the Sun, the high-hydrogen, low-iron model was suddenly adopted without opposition. + TRUE - FALSE
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{About one third of ejecta observed by satellites at Earth is composed of what? { magnetic clouds (i) }
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{Yes or No, A spotless flare may occur in a plage region during its first rotation. + Yes - No
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{Nuclear fission and nuclear fusion may be connected by which of the following? + means for concentrating actinide elements and for separating actinide elements from reactor poisons exist + thermonuclear fusion reactions in stars are ignited by nuclear fission energy - dark matter + the feasibility of thermal neutron fission and fast neutron fission in planetary and protostellar matter may be calculated from nuclear reactor theory - brown dwarfs
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{For a few special cases, rotational velocities for protostars have been obtained directly from observations of the outer optically { thin (i) } regions.
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{True or False, The overdense regions having turned into dark population III objects. + TRUE - FALSE
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{Complete the text: In the case of B335, { rotation (i) } is not important in determining the { force (i) } balance in the outer regions, and this object is in fact undergoing { gravitational (i) } collapse.
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{Complete the text: Match up the likely type of star fission with each of the possibilities below: a triple-component stellar multiple - A massive star fission - B semidetached binary - C a separating close contact binary - D ZAMS system - E tight, circular orbit, impossible to tell eclipses - F lobate star - G coronal mass ejection - H BH Centauri { D (i) }. Plaskett's Star (HR 2422) { B (i) }. Betelgeuse { G (i) } W Ursae Majoris { F (i) }. Beta Lyrae { C (i) }. V1010 Ophiuchi { E (i) } object is confirmed to be co-moving { A (i) }. Sun { H (i) }.
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{True or False, The temperature of the cores of stars may be determined by the balance between the gravitational attraction and the gas pressure. + TRUE - FALSE
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{Which of the following are characteristic of a binary formed via gravitational fragmentation? + the local Jeans length + the local speed of sound + the mean molecular weight - the electron neutrino + the mean particle density - neutrons
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{Which of the following are likely phenomena associated with population III stars - not enough of them + individual masses must either be less than 0.1 M⊙ - clouds + in the range 103–106 Μ⊙ - too much background light - too much material - heavy elements
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{Complete the text: Match up the item letter with each of the cosmogonic possibilities below: interior models of the giant planets - A high interest for cosmogony, geophysics and nuclear physics - B hierarchical accumulation - C clouds and globular clusters - D cosmic helium abundance - E deuterium fusion - F a large deficiency of light elements - G after galactic sized systems had collapsed - H the motions of hydrogen { D (i) } formation of luminous quasars { H (i) }. stars with an initial mass less than the solar mass { G (i) }. rotating liquid drops { B|F (i) }. primordial is less than 26 per cent { E (i) }. a solar mixture of elements dominated by hydrogen and helium gas { A (i) }. around 13 Jupiter masses { F (i) }. smaller rocky objects { C (i) }.
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