Science Article: Life Cycle of Stars

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

• Nebula

• Protostar

• Main Sequence

• Red Giant

During which phase does a star shine brightly and remain stable?

• Protostar

• Main Sequence

• Red Giant

• Supernova

What happens to a star after it exhausts the hydrogen in its core?

• It becomes a nebula

• It turns into a red giant or supergiant

• It becomes a white dwarf

• It explodes into a supernova

What is the process called when hydrogen atoms combine to form helium in a star's core?

• Nuclear fission

• Nuclear fusion

• Gravitational collapse

• Chemical reaction

What remains after a low to medium mass star sheds its outer layers?

• Neutron star

• Black hole

• White dwarf

• Supernova

Which of the following is a characteristic of a red giant?

• It is very hot and dense

• It fuses helium into heavier elements

• It is in the main sequence phase

• It is a region where stars are born

What can the core of a massive star become after a supernova explosion?

• White dwarf

• Planetary nebula

• Neutron star or black hole

• Protostar