Looking at the elements that make up our world, which are the ...

[BRWH]

Looking at the elements that make up our world, which are the products of low versus high mass stars?
 
  What will be an ideal response?

Question 2

In a spectroscopic binary, if a pair shows a combined set of lines tonight, but a maximum split two nights later, its orbital period must be:
 
  A) one day.
  B) two days.
  C) four days.
  D) eight days.
  E) twelve days.

[Bison]

Answer to Question 1

Much of the lighter material in the Earth's crust and our bodies, such as carbon, oxygen, and nitrogen, is the product of low mass stars and given off in planetary nebula, type I supernovae, and stellar winds around giants. But the denser elements of the mantle and core, especially silicon and iron, are delivered to the interstellar medium from the cores of high mass stars by violent type II supernovae.

Answer to Question 2

D

[BRWH]

Excellent

[mcarey591]

Gracias!