Stars and Their Life Cycles
Physics ⇒ Earth and Space Physics
Stars and Their Life Cycles starts at 8 and continues till grade 12.
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A star is observed to have a blue color and high luminosity. What can you infer about its temperature and mass?
Describe the difference between a Type I and Type II supernova.
Describe the process that leads to the formation of a neutron star.
Describe the role of degeneracy pressure in the life cycle of a star.
Explain the process of nuclear fusion in the core of a main sequence star.
Explain why iron is considered the end point of energy-producing fusion in stars.
Explain why massive stars can fuse elements up to iron, but not beyond.
A star is observed to have a blue color and high luminosity. What can you infer about its temperature and mass?
A supernova is most likely to occur at the end of the life cycle of which type of star?
(1) Low-mass star
(2) Sun-like star
(3) High-mass star
(4) Brown dwarf
Which of the following best describes a pulsar?
(1) A rapidly rotating white dwarf
(2) A rapidly rotating neutron star emitting beams of radiation
(3) A type of black hole
(4) A young main sequence star
Which of the following best describes the main sequence phase of a star's life cycle?
(1) The star is fusing hydrogen into helium in its core
(2) The star is fusing helium into carbon in its core
(3) The star is collapsing into a white dwarf
(4) The star is forming from a nebula
Which of the following best explains why massive stars have shorter lifespans than less massive stars?
(1) They burn their fuel more slowly
(2) They have less fuel to burn
(3) They burn their fuel much more rapidly
(4) They are cooler than less massive stars
A star with a mass less than about 0.08 solar masses will become a ________.
A star's color is primarily determined by its ________.
A white dwarf cools and fades over time to eventually become a ________.
Fill in the blank: The Hertzsprung-Russell diagram plots stars according to their ________ and ________.
True or False: All elements heavier than hydrogen and helium are formed in stars.
True or False: All stars end their life cycle as black holes.
True or False: The heavier elements found on Earth were formed in the cores of ancient stars and distributed by supernova explosions.
True or False: The Sun will eventually become a black hole.
