quiz 5.docx - Week 5 Quiz 1 How would you characterize a star known as a white dwarf a The dead remnant of a low to medium mass star b A pre-supernova

quiz 5.docx - Week 5 Quiz 1 How would you characterize a...

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Week 5 Quiz. 1. How would you characterize a star known as a white dwarf? a. The dead remnant of a low to medium mass star. b. A pre-supernova high mass star. c. The remnant left over after a supernova explosion. d. A main-sequence star. 2.WhateventledtoformationoftheCrabNebula? a. acrretion of material from a red giant to a white dwarf.b. a supernova explosion and then outward pressure from a pulsar.c.newbornstars.d. interstellar dust clouds collapsing. 3.Whichofthefollowingaccuratelydescribeblackholes? mass less than 2 solar masses. distorted. them. 4. Why is elemental iron a poor choice for sustained fusion reactions in star cores? a. the energy needed to fuse iron is more than is generated by the fusion. b. Iron is only found in old degenerate stars. c. iron can't fuse with the nuclei of other elements.
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