The following questions refer to the H-R diagram below that shows the life track of a 1-solar-mass star,with various stages labeled with Roman numerals.

-In the end,the remaining core of this star will be left behind as
A)a white dwarf made primarily of carbon and oxygen.
B)a white dwarf made primarily of silicon and iron.
C)a neutron star.
D)a black hole.
E)a supernova.

Question

The following questions refer to the H-R diagram below that shows the life track of a 1-solar-mass star,with various stages labeled with Roman numerals.
 
-In the end,the remaining core of this star will be left behind as
A)a white dwarf made primarily of carbon and oxygen. 
B)a white dwarf made primarily of silicon and iron. 
C)a neutron star. 
D)a black hole. 
E)a supernova.

Quizplus · Accepted Answer

The life track of a 1-solar-mass star shows that it will eventually become a red giant and then a planetary nebula, leaving behind a white dwarf. The white dwarf will be made primarily of carbon and oxygen, as these are the elements left in the core after the outer layers of the star were expelled. Therefore, the best choice is A) a white dwarf made primarily of carbon and oxygen.

The Following Questions Refer to the H-R Diagram Below That