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Author Question: If we imagine the history of the universe compressed into one year, dinosaurs became extinct ... (Read 147 times)

ssal

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on: Jul 27, 2018
If we imagine the history of the universe compressed into one year, dinosaurs became extinct ________.
 
  A) about an hour ago B) about 6 months ago
  C) about 3 weeks ago D) yesterday morning

Question 2

Why don't low-mass stars have the CNO cycle occurring in their cores?
 
  A) They don't have enough carbon, nitrogen, and oxygen.
  B) The CNO cycle makes elements heavier than carbon, nitrogen, and oxygen.
  C) Their core temperatures are too low.


marict

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

D

Answer to Question 2

C


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