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Author Question: Which element would not have been found in Earth's early atmosphere? What is the most abundant gas ... (Read 76 times)

LCritchfi

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on: Jul 27, 2018
Which element would not have been found in Earth's early atmosphere? What is the most abundant gas found in Earth's atmosphere today?
 
  a. nitrogen (N2)
 b. carbon dioxide (CO2)
  c. helium (He)
 d. hydrogen (H)
 e. oxygen (O2)

Question 2

Astronomers can determine the interiors of main sequence stars by _____.
 
  a. studying their atmospheres
 b. creating stellar models
 c. detailed observations of the Sun
 d. using the Hertzsprung-Russell Stellar Model (HRSM)
  e. satellite observations of the closest stars


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jgranad15

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

a

Answer to Question 2

b


LCritchfi

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Reply #2 on: Jul 27, 2018
TY


jgranad15

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Reply #3 on: Jul 27, 2018
You're welcome


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