Cycles
What is the first cycle of a star?
Nebula
What color indicates the highest surface temperature?
Blue
How can size determine the lifespan of a star?
Bigger Stars burn faster, have shorter lifespans. Smaller Stars burn slower, having longer lifespans.
When does a star usually have the most luminosity?
Hotter, bigger, or higher pressure
what elements does a large star make when its a supernova?
Any elements, including above 26
How is a black hole formed?
When a star collapses
How does the temperature if a star change during its red giant phase?
It increases significantly in this phase
What is the lifespan of a massive star before it goes supernova?
A few million years because they burn out quickly
What is the main factor that determines a star's brightness?
The mass
What element mostly fuels the process of nuclear fusion?
Hydrogen
How does the life cycle of a massive star differ from that of a smaller star?
A massive star turns into a supernova then a neutron star or black hole. A small star turns into a planetary nebula then a white dwarf.
What could it mean if a star has high temperature but low luminosity?
Its dying off.
How old(stage of cycle) is the sun currently?
The sun is 4.6 billion years old and it's in its main sequence.
True or False: A star's brightness remains constant throughout its entire life cycle?
False.
What elements does a star produce when its in its main sequence?
helium and hydrogen
True or False? As a star continues its life cycle the fission process starts at hydrogen and helium, combining elements until iron is formed?
True
How does the temperature of a star's core affect its luminosity?
The higher the temperature is in the core the higher the luminosity.
How long does a star spend in the main sequence phase?
10 billion years
How does the brightness of a star change as it moves from the main sequence to the red giant phase?
Its brightness increases
What happens when a star begins to fuse larger elements and grows larger as the core contracts?
It creates a Super giant.
What is occurring in the core of a star as it continues its life cycle?
Nuclear fusion
How does the temperature of a star affect its color?
The hotter a star is the more it emits white and blue light.
True or False: red dwarf can live for tens of billions of years to even trillion of years?
True
What is the relationship between a star's mass and its brightness?
The bigger the star the brighter it is, the smaller the star the less the light.
True or false? The fusion process stops at iron because the star uses hydrogen and helium as fuel for energy and in the nuclear process, but to create anything heavier than iron requires more energy.?
False