The simple Big Bang theory does not solve all of the problems ...

[waynest]

The simple Big Bang theory does not solve all of the problems that we observe (or hope to observe) in our universe. These problems include all of the following EXCEPT:
  a. the existence of magnetic monopoles.
  b. the explanation for the observed flatness of our universe.
  c. the explanation of the extreme homogeneity of direction of our universe.
  d. the explanation of why our universe appears to be expanding at an accelerating rate.
  e. the explanation of why the universe was so hot at the beginning and has cooled off.

Question 2

Which of the following statements is true about the very early universe (within the first three minutes)?
 

a. The electroweak force was the force believed to have first separated from the others.
  b. The entire first three minutes can be explained by applying a grand unified theory.
  c. Electrons only formed after the protons and neutrons.
  d. The end of the first three minutes signaled the first probable nucleosynthesis.
  e. By about 1 second, the universe was about half the present size.

[allisonblackmore]

Answer to Question 1

e.
The Big Bang does explain that the universe used to be very dense and therefore very hot. The expansion of the universe explains the cooling

Answer to Question 2

d.
By the end of the first three minutes, the universe had cooled enough for the nuclear strong force to take effect and nucleons bound together to form deuterons.

[waynest]

Excellent

[chjcharjto14]

Gracias!