Continental Drift Theory

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Questions and Answers

What was the name of the scientist who found the highest points along a submerged mountain range in the Atlantic Ocean?

  • Sonar Mapper
  • Alfred Wegener
  • Unknown (correct)
  • Mid-Atlantic Explorer

What was the key clue in solving 'The Mystery of the Drifting Continents'?

  • Increased interest in mapping the ocean floor after World War II
  • Alfred Wegener's theory of continental drift
  • Discovery of cracks in the earth's crust
  • Identification of surprisingly young volcanic rock on submerged mountain ranges (correct)

What happened to Alfred Wegener's theories after his passing in 1930?

  • They were generally dismissed (correct)
  • They were proven to be incorrect
  • They were widely accepted by the scientific community
  • They led to new investigations

What was one of the strengths of science highlighted in the text?

<p>The ability of new evidence to cause existing theories to change (B)</p> Signup and view all the answers

'The Mystery of the Drifting Continents' was eventually solved by:

<p>'New Evidence from Below' (A)</p> Signup and view all the answers

What was the first physical evidence that the lithosphere actually moved on the surface of the earth?

<p>The observation of magma leaking out of cracks in the ocean floor, leading to seafloor spreading (C)</p> Signup and view all the answers

What led to the idea of seafloor spreading?

<p>The discovery of a pattern of stripes where magnetic orientation switched on either side of mid-ocean ridges (B)</p> Signup and view all the answers

What did scientists find that indicated the continents didn't move through the ocean crust, but were part of a larger moving piece of crust called a plate?

<p>The observation that rocks nearer to mid-ocean ridges were much younger than similar rocks farther away from the ridge (B)</p> Signup and view all the answers

What caused scientists to conclude that both kinds of crust were often different parts of the same piece of crust named plates?

<p>The discovery that both continental and oceanic crusts were often different parts of the same piece named plates (C)</p> Signup and view all the answers

What was a critical discovery into solving 'The Mystery of Drifting Continents'?

<p>Seafloor spreading caused by magma leaking out of ocean floor cracks. (B)</p> Signup and view all the answers

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