The stellar epoch, which we are still in today, began: A) with ...

[MirandaLo]

The stellar epoch, which we are still in today, began:
 
  A) with the end of the quark epoch, when neutrons and protons fused into deuterium.
  B) with the end of the lepton epoch, when neutrinos were formed and escaped from matter.
  C) with the liberation of the dark energy.
  D) about 100 million years after the Big Bang, with the making of galaxies.
  E) about three billion years after the Big Bang, with Population I stars forming.

Question 2

A star in the instability strip of the H-R diagram would:
 
  A) vary in both temperature and radius.
  B) explode as a type I supernova.
  C) vary in temperature and brightness, but not in radius.
  D) vary in brightness with an irregular pattern.
  E) vary in temperature and radius, but not in brightness.

[mcinincha279]

Answer to Question 1

E

Answer to Question 2

A

[MirandaLo]

TY

[mcinincha279]

You're welcome