The Life Cycle of Star

What is the initial stage of a star's life cycle?

• Red Giant

• Protostar

• White Dwarf

• Neutron Star

What process occurs when hydrogen nuclei fuse together to form helium nuclei in a star?

• Nuclear Fission

• Nuclear Fusion

• Chemical Reaction

• Combustion

What causes a protostar to become more dense over time?

• Expansion of core

• Increase in gravity

• Increase in size

• Decrease in temperature

What is the final stage of a small to medium star like our sun?

• Black Hole

• Neutron Star

• White Dwarf

• Red Giant

What happens to a red supergiant after undergoing several cycles of expansion and contraction?

• Collapses into a Black Hole

• Becomes a Neutron Star

• Explodes in a Supernova

• Forms a White Dwarf

What is the name given to a star that has exhausted its hydrogen supplies and is no longer undergoing nuclear fusion?

• Red Giant

• Black Dwarf

• Neutron Star

• White Dwarf

What is the primary factor that determines whether a star will become a red giant or a red supergiant?

• Color of the star

• Distance from Earth

• Size of the star

• Temperature of the star

What is the outcome when a red supergiant collapses in on itself and becomes extremely dense?

• Forms a White Dwarf

• Collapses into a Black Hole

• Explodes in a Supernova

• Becomes a Neutron Star

What is the primary source of energy that keeps the core of a star hot during its main sequence phase?

• Chemical Reactions

• Nuclear Fusion

• Solar Radiation

• Geothermal Heat

What is the term used for a star that has a perfectly balanced outward pressure and inward pressure?

• White Dwarf

• Red Giant

• Black Hole

• Main Sequence Star