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Author Question: Approximately how old are the erosion channels seen on the surface of Mars? A) 3 billion years ... (Read 13 times)

saliriagwu

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on: Jul 27, 2018
Approximately how old are the erosion channels seen on the surface of Mars?
 
  A) 3 billion years
  B) 4.6 billion years
  C) 1 billion years
  D) 500 million years

Question 2

How many forces operated in the universe during the GUT era?
 
  A) one, what we call the super force
  B) two, gravity and the GUT force
  C) two, gravity and the electroweak force
  D) three, gravity, the strong force, and the electroweak force
  E) all of the above forces


pami445

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Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

B


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