Astronomy > QUESTIONS & ANSWERS > ASTRO 001 Unit 3 Quizzes (All)

ASTRO 001 Unit 3 Quizzes

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ASTRO 001 Unit 3 Quizzes What is the general result of the proton-proton chain? - ✔✔4H= He + energy+ other products The corona of the Sun... - ✔✔is visible during a solar eclipse In the convective zone of the Sun.. - ✔✔columns of hot gas rise, cool, and descend What part of the Sun do we typically see? - ✔✔photosphere In nuclear fusion, energy is produced because... - ✔✔the mass of reacting chemicals is larger than that of the products When using different points in the Earth's orbit as a baseline for a parallax experiment, it is best to do the observations... - ✔✔6 months apart One star is four times farther away than another. The parallax angle of the more distant star is... - ✔✔four times smaller than that of the nearer star Star A is 4 times as luminous as Star B. Star A is 2 times as far away as Star B. Which appears brighter and by how much? - ✔✔Both appear to be the same brightness. Absorption lines are... - ✔✔produced when photons of specific wavelengths are absorbed in a star's outer layers by the electrons of specific chemical element s If the radius of star A is twice the radius of star B, but both have similar temperatures, how do their luminosities compare? - ✔✔Star A is 4 times as luminous as star B The lower left corner of the H-R diagram has... - ✔✔the hottest and least luminous stars Which of the following has the largest luminosity? - ✔✔the most massive main sequence star Which of the following is the coldest at its surface? - ✔✔Type K main sequence star Which star is the closest if all have the same apparent brightness? - ✔✔A type M main sequence star Which star is the furthest away if all have the same apparent brightness? - ✔✔Type O main sequence star What does main sequence mean? - ✔✔the curve on the HR diagram where stars of different masses are located while they are converting hydrogen to helium in their cores The sequence of events for the Sun-like star is... - ✔✔stellar nursery, protostar, Sun-like star on main sequence, red giant, planetary nebula, white dwarf Stars less massive than the Sun will also end their lives as... - ✔✔white dwarf Medium-mass stars end as... - ✔✔Type II supernovas then neutron stars High-mass stars end as - ✔✔black holes An 'onion skin' shell burning structure with elements up to iron being produces develops in - ✔✔a star much more massive than the Sun What is at the center of a planetary nebula? - ✔✔the core of the dying star and something that will eventually become a white dwarf WHat is the main requirement for a habitable zone? - ✔✔Liquid water A star that is twice the mass of our Sun would have a habitable zone that - ✔✔includes Mars but not Earth A star that is 75 percent the mass of our sun would have a habitable zone that - ✔✔includes Venus only What factor is not in the Drake Equation? - ✔✔communication lag due to large distances between stars WHat does the Drake equation estimate? - ✔✔the # of technological civilizations in the Milky Way

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