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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See sample questions for grade 12
A star is observed to have a blue color and high luminosity. What can you infer about its temperature and mass?
A star with a mass of 0.5 M☉ will have a main sequence lifetime that is approximately how many times longer than the Sun's? (Lifetime scales as (mass)-2.5)
Calculate the approximate lifetime of a 10 M☉ (solar mass) star on the main sequence, given that the Sun's main sequence lifetime is about 10 billion years and the lifetime scales as (mass)-2.5.
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.
What is a planetary nebula?
What is the Chandrasekhar limit?
What is the primary force that initiates the collapse of a nebula to form a protostar?
Which element is primarily produced during the helium fusion phase in a red giant star?
