Earth's Structure and Movement

How does fossil evidence support Wegener's hypothesis of continental drift?

• Similar fossils are found along continental margins that appear to join together.

• Fossils are found in areas where the present-day climate could not have supported the organisms that made the fossils.

• Similar fossils of giant, land-dwelling dinosaurs are found on continents separated by oceans.

• all of the above

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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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Scientists think that the continents once formed a giant landmass that broke apart, and then slowly drifted apart. What is the name given to this hypothesis?

• sea-floor Spreading

• plate tectonics

• continental drift

• Pangaea

Most geologist think that the movement of Earth's tectonic plates is caused by

• the rotation of the Earth.

• the Earth's magnetic field.

• subduction.

• convection currents.

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Ocean crust is made of _______ and is _______ dense than continental crust.

• basalt, less

• basalt, more

• granite, less

• granite, more

Most tectonic plates have both oceanic and continental crust. How are they different?

• Oceanic is thinner and less dense than continental.

• Continental is thinner than more dense than oceanic.

• Continental is thicker and less dense than oceanic.

• Oceanic is thicker and more dense than continental.

What is the force that moves the continents? 

• Conduction 

• Convection 

• Radiation 

• Conveyor belts 

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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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