Life Cycle of a Star & the Sun

A star, like the sun, is mainly composed of which two gasses?

• Hydrogen and Oxygen
• Hydrogen and Helium
• Helium and Oxygen
• Nitrogen and Hydrogen

What force pulls the gas and dust clumps together in a stellar nebula?

• Friction
• Gravity
• Magnetism
• Nuclear Fission

Which phase in a star’s life cycle is more stable

• Protostar
• Main sequence
• Red giant
• Red supergiant

What will a massive star (1000X our sun) become at the end of its life

• Supernova
• Planetary nebula
• Black dwarf
• Black hole

What will the our sun (average size) become at the end of its life

• Supernova
• Planetary nebula
• Black dwarf
• Black hole

In what phase do stars spend the majority of their life?

• Main sequence
• Supernova
• Red giant
• Blue giant

In the last phase of a red giant star, it sheds its outer layers and forms what?

• White dwarf
• Black dwarf
• Stellar nebula
• Planetary nebula

What is the correct order of a main sequence star of average size, like the sun? 1) white dwarf 2) planetary nebula 3) red giant 4) main sequence 5) protostar

• 1, 2, 3, 4, 5
• 3, 4, 5, 2, 1
• 4, 3, 1, 2, 5
• 5, 4, 3, 2, 1

What is the correct order of a main sequence star that is MUCH larger than our sun? 1) supernova 2) main sequence 3) red supergiant 4) blackhole 5) protostar

• 1, 2, 3, 4, 5
• 3, 4, 5, 2, 1
• 5, 2, 3, 1, 4
• 5, 4, 3, 2, 1

Which has a warmer temperature, black or white dwarf?

• Black
• White
• They would be the same