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Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN: 9780134746241
Author: Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher: PEARSON
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
Transcribed Image Text:Learning Task 5: Read the following paragraph. Determine whether these
statements are correct. Justify your answer if it is correct. If is false, try to
explain what makes the statements wrong.
1.
One of the first lines of evidence suggesting the existence of plate
tectonics was the discovery of very similar fossils in rock masses separated by
vast distances and by ocean expanses. It suggested that those land areas had
in the past been connected.
The similarity of coastlines for different continents suggests that they
may once have been connected. But the fact that they were separated by
sometimes thousands of miles suggested continental drift or plate tectonics.
2.
3.
The magnetic North and South poles of the Earth correspond closely,
although not exactly, with the spin axis of the Earth. Although the mechanism
of generation of the magnetic field, called the geodynamo, is not fully
understood, it is clear that it has something to do with the rotation of the
Earth and the presence of mobile materials with significant electrical
conductivity which can circulate.
Earthquakes don't occur randomly across the world, but happen across
limited belts which also contain most of the world's volcanoes. These belts
mark the location of plate boundaries. These areas are so active because the
4.
stress of 2 plates against each other and eventually gives in the form of a
volcano or earthquake. The largest belt of activity is the "Ring of Fire"
surrounding the Pacific Ocean which is home to 90% of all quakes.
5.
As we travel farther and farther out from the spreading center the rocks
get older and older, and the magnetic orientation of the rocks changes with the
magnetic pole reversals.
Learning Task 6 :: Read the following questions. Choose the letter of
the best answer. Write your answer in your notebook.
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