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Author Question: Currently, most of the mass of the matter of the universe is believed to consist of A) baryonic ... (Read 132 times)

jilianpiloj

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on: Jul 27, 2018
Currently, most of the mass of the matter of the universe is believed to consist of
 
  A) baryonic matter, made up of protons and neutrons.
  B) tachyonic matter, travelling only faster than the speed of light.
  C) dark matter not made of protons and neutrons.
  D) dark energy.
  E) tiny but very numerous black holes.

Question 2

What evidence from the careful examination of impact craters provides evidence that Mars had surface water long ago?
 
  A) indistinct rims of many large craters due to water erosion
  B) lack of small craters which would have been erased by ancient rainfall
  C) channels where water once flowed between crater lakes
  D) all of these


nmyers

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

C

Answer to Question 2

D


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jilianpiloj

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


nmyers

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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