Stellar Evolution Quiz

What is the initial stage in the life cycle of a star?

• Main sequence star

• Red giant

• Nebula

• White dwarf

What causes a molecular cloud to collapse and form protostars?

• Shock waves from nearby stars

• Magnetic field interactions

• Decrease in density

• Increase in temperature

What is a key characteristic of a protostar?

• It is a stable star like the sun

• It has a hot core ready for fusion

• It is a remnant of a supernova

• It forms a disk and generates a magnetic field

What marks the transition of a protostar into a hydrogen-burning star?

• The collapse of the star

• The onset of nuclear fusion

• The ejection of stellar winds

• The formation of a red giant

What keeps a main sequence star stable for billions of years?

• The constant increase in mass

• The balance between gravity and nuclear fusion

• The rapid rotation of the star

• The presence of a strong magnetic field