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Author Question: What could ultimately be linked to the present absence of water on Mars? a. The large decrease in ... (Read 200 times)

bb

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on: Aug 22, 2018

What could ultimately be linked to the present absence of water on Mars?
  a. The large decrease in carbon dioxide
  b. The proximity to the sun
  c. The lack of free oxygen in the atmosphere
  d. The lack of outgassing from the interior of the planet
  e. Excess carbon dioxide



Question 2

High levels of ____ could indicate life on other planets.
  a. free nitrogen
  b. carbon dioxide
  c. free oxygen
  d. methane
  e. ozone



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trampas

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Reply #1 on: Aug 22, 2018
Answer to Question 1

a

Answer to Question 2

c


bb

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Reply 2 on: Aug 22, 2018
Wow, this really help

kjohnson

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Reply 3 on: Yesterday
Excellent

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