Life Cycle of Stars Quiz

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

• Main sequence star

• Protostar

• Nebula

• Red giant

What force pulls dust and gas together to form a protostar?

• Nuclear force

• Magnetism

• Electrostatic force

• Gravity

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

• Radioactive decay

• Nuclear fusion

• Nuclear fission

• Chemical reaction

What is the stage called when a star is stable and balanced by nuclear fusion and gravity?

• Protostar

• Main sequence star

• Red giant

• White dwarf

What happens to a star when it runs out of hydrogen?

• It becomes a black hole

• It contracts and then expands

• It explodes immediately

• It becomes a nebula

What type of star does our sun become after the main sequence stage?

• Red supergiant

• White dwarf

• Red giant

• Neutron star

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

• Neutron star

• Black dwarf

• Red supergiant

• Black hole

What event occurs when a red supergiant explodes?

• Nebula formation

• White dwarf formation

• Supernova

• Black hole formation

What is formed if a very big star condenses into a very dense core?

• Black hole

• White dwarf

• Neutron star

• Red giant

What is the final stage of a truly massive star?

• Black hole

• White dwarf

• Neutron star

• Red giant