Continental Drift and Seafloor Spreading

Who is the person credited with developing the theory of continental drift?

• Harry Hess
• Galileo
• Alfred Wegener
• Newton

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What is this a picture of?

• plate tectonics

• continental drift

• pangaea

• glacier scaring

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The theory of continental drift named a key part of this idea Pangaea. What is Pangaea?

• One of the ancient animals that helped Wegener prove that fossils from different continents originally came from the same location
•  supercontinent that existed in Earth's distant past
• The underwater ocean range in the middle of the ocean
• The hot spot which gave rise to the Hawaiian Islands, among others

Why was Wegener's theory not accepted?

• He had no proof of how they were moving
• He had no evidence
• He was married
• He was not a Scientist

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The Theory of Continental Drift states that Pangaea broke apart and the continents "drifted" away from each other

• True
• False

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What are the three types of Evidence that supports Alfred Wegener's Theory?

• Fossils, Fish, and Land

• Sedimentary, Magma, and Climate

• Fossils, Land forms, and Climate

• Climate, Land forms, and Metamorphic rock

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This is a picture of glacier scars found in Africa.  What are these evidence for?

• Africa has always been near the equator
• Africa was once in an area of the Earth that had a very cold climate
• The continents have not moved
• sea floor spreading

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What evidence did Wegener use to support his theory?

• Continents and fossils fitting together/matching-up like puzzle pieces

• glacier scars and other climate evidence from temperature

• mountain ranges and rocks line up across continents

• all of the above

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According to the continental drift hypothesis, the presence of similar fossils in South America and Africa supports which scientific idea?

• Animals easily and frequently travel from Africa to South America.

• Species of animals probably traveled between continents on natural rafts (such as trees destroyed in tsunamis).

• Land bridges once existed that connected the continents.

• South America and Africa were once connected together.

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What does the theory of continental drift state?

• The continents were once joined in a super-continent and have moved over time
• Continents are stationary and do not move
• The Earth is broken into lithospheric plates that move due to convection currents
• none of the above

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