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Author Question: Which kind of seismic wave is fastest moving? A) P waves B) S waves C) surface waves D) ... (Read 139 times)

ishan

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on: Jul 14, 2018
Which kind of seismic wave is fastest moving?
 
  A) P waves
  B) S waves
  C) surface waves
  D) Seismic waves all travel at the same speed.

Question 2

Examine this map showing the age of the crust in Africa and South America, and the position of ancient mountain belts (areas where mountain ranges used to exist but have since been eroded down to their roots).
 
  This information was not available to Alfred Wegener. Would he find it consistent with the idea of continental drift, or would it prove his idea wrong? Explain.
 
  What will be an ideal response?


CourtneyCNorton

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Reply #1 on: Jul 14, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: Yes, this map provides evidence in support of continental drift (or plate tectonics). The big pink chunks of Archean-aged rock very clearly run off the edge of one continent and pick up again on the other. Ditto for the mountain belts  these are like images on separate puzzle pieces that make more sense once the two pieces are snapped together.


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ishan

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Reply #2 on: Jul 14, 2018
TY


CourtneyCNorton

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Reply #3 on: Jul 14, 2018
Happy to Help


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