Explain what happens to Helium as Hydrogen decreases in the Sun

Question

I'm having trouble with my Science project. On the rubric it stated, "Students use the model to predict how the relative proportions of hydrogen to helium change as the sun ages".

The teacher also added a side note saying, "Explain what happens to Helium as Hydrogen decreases, etc."

Answer 1

1.) The ultimate fate of a star depends on its initial mass.
Stars of low mass (less than 1/2 our Sun) which are too cool to fuse He to Carbon and 0xygen, will eventually end as white dwarfs made of helium.

2.)A massive star will end with a violent explosion (a supernova), and the contents will be expelled into space.

3.)The matter ejected in a supernova will become a glowing supernova remnant.  

 

Please see

http://imagine.gsfc.nasa.gov/science/objects/stars1.html

for a lengthy review of the formation and fate of stars.