Lifecycle of Stars Quiz

What initiates the formation of a protostar?

• Gravitational force

• Magnetic fields

• Electromagnetic radiation

• Nuclear fusion

At what point does a protostar become a star?

• When it fuses hydrogen into helium

• When it cools down

• When it starts rotating

• When it forms a planetary nebula

What balances the gravitational forces in a main sequence star?

• Nuclear fusion

• Magnetic fields

• Electromagnetic radiation

• Rotational forces

How long does the main sequence period last for a star like our sun?

• Several hundred years

• Several billion years

• Several thousand years

• Several million years

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

• It becomes a black hole

• It becomes a neutron star

• It swells into a red giant

• It explodes in a supernova

What is left behind after a sun-like star sheds its outer layers?

• A black hole

• A neutron star

• A white dwarf

• A red supergiant

What is the final stage of a sun-like star?

• White dwarf

• Black hole

• Red supergiant

• Neutron star

What happens to massive stars when they run out of hydrogen?

• They become main sequence stars

• They become red supergiants

• They become white dwarfs

• They become planetary nebulas

What event leads to the formation of heavier elements in massive stars?

• Red giant phase

• Main sequence period

• Formation of a protostar

• Supernova explosion

What can be left behind after a supernova explosion?

• A planetary nebula

• A neutron star or black hole

• A red giant

• A white dwarf