Astronomy Chapter Twelve

21 Questions  I  By Moonshark13
Astronomy Chapter Twelve

  
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1.  Why is Supernova 1987A particularly important to astronomers?
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E.
2.  What is the range of star masses for high-mass stars?
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B.
C.
D.
E.
3.  What happens when a star exhausts its core hydrogen supply?
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B.
C.
D.
E.
4.  What types of stars end their lives with supernovae?
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B.
C.
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E.
5.  Which two energy sources can help a star maintain its internal thermal pressure?
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B.
C.
D.
E.
6.  Why does a star grow larger after it exhausts its core hydrogen?
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B.
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7.  What is a planetary nebula?
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B.
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8.  What happens to the core of a star after a planetary nebula occurs?
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9.  What is the fate of an isolated brown dwarf?
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10.  You discover a binary star system in which one member is a 15Msun main-sequence star and the other star is a 10Msun giant. Why should you be surprised, at least at first?
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11.  What happens after a helium flash?
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B.
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12.  What type of star is our Sun?
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B.
C.
13.  What is the CNO cycle?
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14.  What happens when the gravity of a massive star is able to overcome neutron degeneracy pressure?
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15.  How many helium nuclei fuse together when making carbon?
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16.  The helium fusion process results in the production of
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17.  What did Carl Sagan mean when he said that we are all "star stuff"?
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18.  Which of the following sequences correctly describes the stages of life for a low-mass star?
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19.  No stars are expected with masses greater than 150 times our Sun because
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20.  After a supernova event, what is left behind?
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D.
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21.  Which of the following statements about degeneracy pressure is not true?
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B.
C.
D.
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