HR diagram and evolution of stars

How does a star like the sun form?

• Gravity pulls gas and dust together, a protostar forms.

• Fusion starts and the Star enters the main sequence stage.

• The star's core collapses and the star becomes a neutron star

• Fission starts and radioactive decay happens

What happens to a sunlike star after it's main sequence stage?

• The star becomes a red giant, then a planetary nebula, and it's core becomes a white dwarf

• It becomes a supernova and becomes a neutron star

• It remains stable as a main sequence star forever
• It expands into a red giant and becomes a planetary nebula afterwards.

What stage is our Sun currently in?

• planetary

• red giant

• neutron

• main sequence

What happens to a star larger than our Sun after main sequence

• The star becomes a red supergiant, explodes and dies forever

• The star becomes a red supergiant, explodes in a supernova, becomes either a blackhole or neutron star

• The star becomes a red giant, explodes in a supernova, and becomes a dwarf.

• The star will live on forever.

Describe a life cycle of a star.

What does absolute magnitude mean

• brightness of star from a certain distance

• temperature of star

• brightness of star

• mass of star

What star type is in the middle of the HR diagram

• Main Sequence

• Dwarfs

• Galaxies

• Red Super Giant

What is the Y and X axes for the HR diagram respectively?

• Luminosity and Temperature (highest temp on the left)

• Brightness and Mass

• Mass and Density

• Don't know