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Author Question: Oceans of water and continental crust were present A) 150 000 000 years after Earth formed. B) ... (Read 107 times)

cagreen833

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on: Jul 16, 2018
Oceans of water and continental crust were present
 
  A) 150 000 000 years after Earth formed.
  B) 2 000 000 000 years after Earth formed.
  C) 15 000 000 years after Earth formed.
  D) 75 000 000 years after Earth formed.

Question 2

What determines the chemical composition of the dust particles that form around a protostar?
 
  A) heat
  B) pressure
  C) contents of the star that exploded to form the protostar
  D) gravity of nearby objects


owenfalvey

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Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: A


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