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Author Question: The Moon, Mercury, and Mars do not have plate tectonics because A) they have cooled so rapidly ... (Read 49 times)

tatyanajohnson

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on: Jul 27, 2018
The Moon, Mercury, and Mars do not have plate tectonics because
 
  A) they have cooled so rapidly that they do not have enough internal convection to break up their thick crusts
  B) they have no oceans for subduction and seafloor spreading to occur in
  C) impacts have filled in the plate boundaries essentially turning the process off
  D) their crusts have dried up and thickened so the crust cannot be broken up into plates

Question 2

My flashlight beam makes an angle of 60. degrees with the surface of the water before it enters the water. In the water what angle does the beam make with the surface?
 
  A) 0
  B) 30
  C) 60
  D) 22
  E) 68


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todom5090

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

A

Answer to Question 2

E


tatyanajohnson

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Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

isabelt_18

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Reply 3 on: Yesterday
Excellent

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