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Author Question: The radioactive ages of the moon rocks show that the Moon's surface solidified about _____. A) ... (Read 62 times)

future617RT

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on: Jul 27, 2018
The radioactive ages of the moon rocks show that the Moon's surface solidified about _____.
 
  A) 2.5 billion years ago
  B) 3.4 billion years ago
  C) 4.4 billion years ago
  D) 5.5 billion years ago

Question 2

Liquid water cannot survive on the surface of Mars because:
 
  A) the atmosphere is too dense.
  B) the air pressure is too low.
  C) Mars has the highest escape velocity.
  D) Mars has never differentiated.


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ErinKing

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

C

Answer to Question 2

B


future617RT

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Reply #2 on: Jul 27, 2018
Thank you!


ErinKing

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Reply #3 on: Jul 27, 2018
Always glad to help...


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