Name Chapter 2: Homework questions MULTIPLE CHOICE 1. One of the most general co
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Name Chapter 2: Homework questions MULTIPLE CHOICE 1. One of the most general conclusions to be drawn from plate tectonic theory is that A. Earth is continually losing heat. B. Earth's gcography has continually changed C. Earth is slowly expanding D. Earth is slowly shrinking E. the ocean basins are continually enlarging The first scientist to suggest a link between Africa and South America based on fossils was A. Frank Taylor, 1910. B. Edward Suess, 1855. C. Snider-Pellegrini, 1858. D. Harry Hess, 1962. E. Alfred Wegener, 1912. 2· 3. Rates of plate motion are best determined by A measuring the change in distance between two continents over time B. dating magnetic anomalics on the scafloor and calculating distance from the spreading center C. using global positioning system to measure changes in locations over time D. using hot spots to determine the direction of motion 4. The first rock type similarities between Gondwana continents to be discovered were A. continuity of mountain ranges B. fit of the coastlines. C. glacial tillites D. marine sediments E. lake and swamp sodiments of Pemnsylvanian coal beds Beside his hypothesis of continental drift, Frank Tay lor (1910) correctly proposed th A the Moon was captured by Earth 100 million years ago B. similar mountain ranges on either side of the Atlantic were produced by lateral movement of the continents C. the Mid-Atlantic Ridge was the zone along which the continents had separated D. that all of the southern hemisphere continents were once joined together E. the glacial deposits on Gondwana continents were formed by a single glacier 6. If the continents were once joined together, rocks and mountain ranges on the margins of each A. should have formed under the same conditions B, should have formed in the same soquences C. should have formed at the same time. D. should have the same structural trends and forces. E all of the above Studies of palcomagnetism showed that A. the northern and southernm hemispheres had many times reversed position B. the ocean basins were young. C. each continent had once had its own magnetic north pole. D. the continents remained fixed and the north magnetic pole has moved. E all of the above 7.Explanation / Answer
1) answer- option B
Earth's geography has continually changed.
plate tectonics theory states that outer rigid layer of earth i.e. the lithosphere is divided into couple of dozen plates that move around across the surface of earth wrt to each other.
2) answer - optionB
Edward Suess in1855
3) answer- option b
dating magnetic anomalies on the seafloor and calculating the distance from the spreading centre.
Although the formula for finding the rate is defined as distance per unit time but the best way to find the rate of plate motion is via finding local variation in earth's magnetic field which is called magnetic anomaly and then calculating the distance from the spreading centre.
4) answer- option c
glacial tillites.
till is derived from the erosion of material by the moving ice.matching beds of ancient tillites on opposite sides of the south atlantic ocean provided early evidence of continental drift.
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