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Author Question: Earth's earliest atmosphere was most likely composed of hydrogen, helium, A) oxygen, and ... (Read 91 times)

Jipu 123

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on: Jul 29, 2018
Earth's earliest atmosphere was most likely composed of hydrogen, helium,
 
  A) oxygen, and nitrogen.
  B) methane, and nitrogen.
  C) methane, and ammonia.
  D) oxygen, and ozone.

Question 2

Earth's atmosphere probably developed from gases escaping from its interior during volcanic eruptions. This outgassing also produced Earth's
 
  A) protective ozone layer.
  B) oceans.
  C) numerous mountain belts.
  D) ionosphere.


johnharpe

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: C

Answer to Question 2

Answer: B


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Jipu 123

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Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


johnharpe

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Reply #3 on: Jul 29, 2018
Great! Please up vote :D


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