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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. 2. 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. 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.

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. 2. 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. 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.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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Learning Task 4: Read the following paragraph. Determine whether these statements are correct. Justify your answer if it is correct. If it 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. 2. 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. 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. 4. 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 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. As we travel farther and farther out from the spreading center the rocks get 5. older and older, and the magnetic orientation of the rocks changes with the magnetic pole reversals.
Transcribed Image Text:Learning Task 4: Read the following paragraph. Determine whether these statements are correct. Justify your answer if it is correct. If it 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. 2. 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. 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. 4. 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 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. As we travel farther and farther out from the spreading center the rocks get 5. older and older, and the magnetic orientation of the rocks changes with the magnetic pole reversals.
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