Continental Drift Theory
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Questions and Answers

Who first speculated the idea that continents might have drifted?

  • Abraham Ortellius (correct)
  • A German meteorologist
  • Pangea
  • Alfred Wegener

In which book did Alfred Wegener present his ideas about continental drift?

  • The Paleozoic and Mesozoic Era
  • The Origin of Continents and Oceans (correct)
  • The Supercontinent Pangea
  • The Drifting Continents

What was the name given to the supercontinent that was formed by a series of continental collisions?

  • Laurasia
  • Gondwana
  • Pangea (correct)
  • Ortellius

During which era did the supercontinent Pangea begin to break apart?

<p>Mesozoic era (D)</p> Signup and view all the answers

Which landmass includes most of the present-day North America, Greenland, Europe, and Asia?

<p>Laurasia (D)</p> Signup and view all the answers

Which landmass includes most of the present-day South America, Africa, India, Australia, and Antarctica?

<p>Gondwana (A)</p> Signup and view all the answers

What did Harry Hess theorize in the 1960s?

<p>The sea floor is moving along with the continents (A)</p> Signup and view all the answers

What is the driving force for the motion of the continents and the sea floor?

<p>Mantle convection (B)</p> Signup and view all the answers

What led to the formation of the Himalayan mountain range?

<p>Collision of India with Asia (D)</p> Signup and view all the answers

What did the Pangea breakup lead to?

<p>Formation of isolated continental regions (D)</p> Signup and view all the answers

What is the proof that supports sea floor spreading?

<p>Paleomagnetism (B)</p> Signup and view all the answers

What happens when hot magma rises to the surface at mid-oceanic ridges?

<p>It solidifies and forms new oceanic crust (C)</p> Signup and view all the answers

What does seismic studies confirm about oceanic crust?

<p>It is sinking into the trenches (C)</p> Signup and view all the answers

What did Harry Hess propose as the explanation for sea floor spreading?

<p>Mantle convection (D)</p> Signup and view all the answers

What caused the formation of mid-oceanic ridges and rifts on the ocean floor?

<p>Hot magma emissions (A)</p> Signup and view all the answers

What has been found to be moving away from the rift at mid-oceanic ridges?

<p>Solidified lava on both sides of the ridge (B)</p> Signup and view all the answers

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