Understanding the Star Life Cycle

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

• Red Giant

• Main Sequence

• Nebula

• White Dwarf

During which stage of a star's life cycle does nuclear fusion begin?

• Protostar

• Red Giant

• White Dwarf

• Black Hole

What is the primary element that stars fuse during the main sequence stage?

• Helium

• Carbon

• Hydrogen

• Oxygen

Which of the following is a stage in the life cycle of an average star?

• Neutron Star

• Black Hole

• Red Giant

• Supernova

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

• White Dwarf

• Neutron Star or Black Hole

• Red Giant

• Main Sequence

How does the life cycle of an average star differ from that of a massive star?

• Average stars become black holes, massive stars become white dwarfs.

• Average stars end as white dwarfs, massive stars end as neutron stars or black holes.

• Average stars skip the red giant phase, massive stars do not.

• Average stars undergo supernova, massive stars do not.

What does the HR diagram plot?

• Star mass vs. age

• Star temperature vs. luminosity

• Star size vs. distance

• Star colour vs. temperature

Where is our Sun located on the HR diagram?

• Top right

• Bottom left

• Middle of the main sequence

• Top left

Which type of star is found in the top right of the HR diagram?

• White Dwarfs

• Red Giants

• Main Sequence Stars

• Neutron Stars

What happens to a star's core during the red giant phase?

• It expands and cools.

• It contracts and heats up.

• It remains the same size.

• It explodes.