Biology, 31.03.2021 23:10 keenansimpkinsoy0oqc
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4. Using Graphs Use the slope of the graph to determine how quickly the convergent boundary descends as latitude increases.
5. Calculating A change in latitude of one degree corresponds to a distance of approximately 111 km along a north–south line. Using this information and your answer to Question 4, determine how far the convergent boundary descends as it moves 1 km northward. Show your work.
Use your results from Question 5 to help you answer Questions 6 and 7.
6. Using Models Draw a triangle that shows a side view of the convergent boundary with the correct scale relationship between horizontal distance and depth. Measure the angle at which the subducted plate descends beneath the upper plate. This is called the subduction angle.
7. Calculating Imagine there is a volcanic island arc on the surface of the lithosphere above the area where the descending plate reaches a depth of 100 km. Approximately how far north of the trench are the islands located? Show your work.
8. Evaluating and Revising Are all of the data points you plotted on the graph close to the straight line you drew to best fit the data? Provide possible explanations for your answer.
9. Applying Concepts Is the year in which an earthquake occurred an important variable in this investigation? Explain.
Go Further
The United States Geological Survey provides earthquake data from locations around the world. Obtain earthquake data near a divergent boundary such as an oceanic ridge or a transform fault boundary such as the San Andreas Fault. Graph some data points to see whether the depths of the foci of the earthquakes change as the distance from the boundary increases. Compare your findings to the results from this investigation. Explain any differences.
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