Lesson 2 "Pangea to the Present"
- In your own words explain what the Continental Drift Theory states.
The Earth's plates are moved very slowly, 1-4 inches per year, by
convection currents emenating from the mantle. These plates have been moving for millions of
years and continue to move today.
- How did Alfred Wegener try to prove that the continents of Africa and
South America were once connected.
Alfred Wegener discovered that the magnetic bands
in rocks from South America did not point ot the north pole as
they should. If these rocks were moved to the position that Wegener though they were created
then they did point ot the northpole. He also matched rocks from Africa and South
America for mineral content and age.
- How did the ancient people of Japan explain earthquakes?
The Japanese explained that earthquakes were produced by a giant
catfish called Namazu. This catfish lived under the Earth's surface and shook very violently
when it was not kept under control by the god Kashima.
- How did the ancient Romans explain the presence volcanoes.
Vulcan, the god of weapons, used the volcanoes off the coast of the
Roman Empire as his forge.
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