Which of the following is used for nuclear reactions during the death of stars?
a) energy
b) mass
c) fuel
d) radiation
Nuclear reactions outside the core cause the dying star to expand outward in the……….phase before it collapse.
a) red giant
b) blue giant
c) yellow giant
d) white dwarf
After
the formation of red giant, the core of the star ends up as one of the
………types.
a) two
b) three
c)
four
d)
six
If the initial mass of the star is less than or equal to the mass of the solar mass, the red giant becomes…….
a) white dwarf
b) neutron star
c) black hole
d) none of these
What is the
estimated size of white dwarf?
a) moon
b) comet
c) earth
d) sun
The sun is about…….billion years old.
a) 4.5
b) 5
c) 10
d) 15
