Before about 4 billion years ago the universe was: A) ...

[tiara099]

Before about 4 billion years ago the universe was:
 
  A) radiation dominated.
  B) quark dominated.
  C) lepton dominated.
  D) matter dominated.
  E) dark energy dominated.

Question 2

While often called twins, Uranus and Neptune still have significant differences. Discuss some of them.
 
  What will be an ideal response?

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Answer to Question 1

D

Answer to Question 2

In mass, Neptune is slightly heavier, even though Uranus is slightly larger in size. Both rotate faster than Earth but slower than Jupiter and Saturn. Uranus has a flopped over axial tilt of 98 degrees, capable of pointing its poles directly at the Sun, while Neptune has a more normal 29 degree tilt. The atmosphere of Neptune is bluer in color and more active, surprising since Uranus gets more solar heat; Neptune generates its heat internally, something that Uranus, alone among the jovians, does not do to any degree. Both have odd magnetic fields, with Uranus even more tilted than Neptune, and neither field passes through the core.

[tiara099]

Thanks

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