Continental Drift and Tectonic Plates

What is the Theory of Continental Drift?

• New continents are continually being created

  and destroyed.

• The layout of the continents is the same today

  as it has always been

• The continents have always been separate but

  may one day drift together to form a single

  continent

• All the continents were once one continent that

  broke up and drifted apart over hundreds of

  millions of years

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The cause of earthquakes and how they are formed is the

• Greenhouse Effect in the Ozone

• melting of glacial ice in global warming

• movement of continental plates

• meteors that hit earth's surface from space

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The theory of continental drift states that all the continents were once part of one big landmass called Pangaea. Who was the scientist that came up with this theory?

• Harry Hess

• Bill Nye

• Alfred Wegener

• Albert Einstein

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Why was Alfred Wegener unable to explain his theory?

• He couldn't explain how the continents drifted.

• He couldn't explain why similar fossils on different continents were separated

• He couldn't explain why similar geological structures found were found on different continents.

• He couldn't explain why the continents fit together like a puzzle.

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Tectonic plates float on top of the

• crust

• asthenosphere

• lower mantle

• outer core

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Wegener's evidence supports his theory of a super continent that he named?

• Ultima
• Pangaea
• Plate Tectonics
• Continental Drift

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Which of the following is evidence that supports continental drift?

• the presence of penguins at both the equator and Antarctica
• fossils of the same plant have been found on several continents
• the presence of glacial features in Antarctica
• the presence of volcanic rock in Antarctica

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This theory states that hot, dense material (magma) below Earth’s crust rises to the surface and flows sideways, carrying dirt and other materials away from the ridge in both directions.

• erosion

• subduction

• seafloor spreading

• continental drift

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These are large sections of Earth’s oceanic or continental crust and rigid upper mantle that move around on the asthenosphere.

• Pangaea

• continental drift

• seafloor spreading

• plates

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Is there a pattern to the locations of earthquakes and volcanoes around the globe?

• No, earthquakes and volcanoes are random.

• Yes, earthquakes and volcanoes usually occur near the boundaries of tectonic plates.

• yes, earthquakes and volcanoes usually occur in the middle of tectonic plates.

• No, earthquakes and volcanoes usually occur under water.

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