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Author Question: Earth's first atmosphere (approximately 4.6 billion years ago) was most likely composed of ____. A) ... (Read 90 times)

yoooooman

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on: Jul 13, 2018
Earth's first atmosphere (approximately 4.6 billion years ago) was most likely composed of ____.
 A) nitrogen and oxygen
  B) hydrogen and helium
  C) carbon dioxide and nitrogen
  D) oxygen and carbon dioxide

Question 2

A chart that plots how air temperature has changed over the past five days at a given station is a(n) ____.
 A) sounding
  B) meteogram
  C) atmospheric model
  D) ensemble forecast


kescobar@64

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Reply #1 on: Jul 13, 2018
Answer to Question 1

B

Answer to Question 2

B


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