Star Life Cycle

What is the term used to describe the actual brightness of a star?

• Luminosity

• Spectral class

• Absolute Magnitude

• Surface temperature

What is the initial stage of an average star's life cycle?

• Red Giant

• Planetary Nebula

• White Dwarf

• Average Star

What happens to an average star when it runs out of hydrogen?

• It becomes a White Dwarf

• It fuses helium and heavier elements until it makes iron

• It collapses into a black hole

• It explodes as a supernova

What is the next stage after an average star becomes a Red Giant?

• White Dwarf

• Supernova

• Planetary Nebula

• Black Hole

What causes the formation of a Planetary Nebula?

• The star gets too big, the material collapses on itself and implodes

• The star explodes as a supernova

• The star collapses into a black hole

• The star cools down and solidifies

What is left after a Planetary Nebula phase in the life cycle of an average star?

• Black Hole

• Neutron Star

• White Dwarf

• Red Giant

What happens to a massive star when it becomes a red supergiant?

• It burns hot and blue, fusing elements.

• Helium cools and swells to form a shell when iron can no longer be fused.

• Gravity of the heavy core pulls the material back, causing a rebound.

• Gravity becomes so strong that even light can't escape.

What is the final stage of a massive star if gravity becomes so strong that even light can't escape?

• Red Supergiant

• Supernova

• Neutron Star

• Black Hole

What is left over after a supernova if the core is made of super dense neutrons?

• Red Supergiant

• Neutron Star

• Black Hole

• Massive Star

What causes the material to rebound during a supernova?

• Helium cooling and swelling

• Gravity of the heavy core pulling the material back

• Formation of a black hole

• Fusing of elements in a massive star