Plate boundaries are discontinuities that define the margins of the lithosphere plate Plate movements are responsible fo

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Plate Boundaries Are Discontinuities That Define The Margins Of The Lithosphere Plate Plate Movements Are Responsible Fo 1 (57.85 KiB) Viewed 52 times

Plate boundaries are discontinuities that define the margins of the lithosphere plate Plate movements are responsible for many of the geologie processes that shape Earth's outer surface. Your instructor bandoulindly described some details of plate movements and their consequences during lecture. Many of Earth's intomally driven catastrophic prices such as volcanic eruption, earthquakes, tsunami, and landslides tend to occur in active plate boundary region. The following exercise of coloring plate tectonic of the world (Figure 1.2) and locating major cities will help you appreciate spatial relationships between global population and plate boundary location. To statistically analyze these relationships you will create a fotogram to show the member of cities located at specific distances from plate boundaries Procedure / Problems 1. Color your map of Earth and its plates (Figure 1.2), using the following color scheme: land masser light brown (shade these areas lightly) vas ne se light blue (shade these areas lightly comercnil plate boundaries dark blue lines divergent plate boundaries dark red lines transform plate houndaries, dark green lines 2. Carefully locate the 30 most populated cities of the world (Figure 1.1) shown as distinct black squares on your map (Figure 1.2) Precise locations may be obtained from internet search of maps for the various countries Label each city with a one or two letter abbreviation (eg. LA for Los Angeles or NY for New York). Use black in 3. Use a scrap of paper to fashion a simple scale that corresponds to the markings of the bar scale on the map (your instructor will demonstrate this). Use your scale to determine the distance from each city to the closest plate boundary in kilometers Keep track of each distance for Problem 4 below. 4. Use the template of Figure 1.3 to make a histogram of number of cities vs. distance to nearest plate boundary. Subdivide your horizontal axis into five groupings as follows: 0-500 km, 0-100 km, 1001-2000 km, 2001-3000 km, and greater than 3000 km. Each city will plot as a box with height of 1 unit on the vertical axis. Your completed chart will be a bar graph, with five bars extending upward from the horizontal axis. The height of each bar will depend on the number of cities contained in the specified distance range. Each bar should be composed of stacks of individual boxes. For example, Los Angeles is about 80 km from a transform plate boundary (the San Andreas fault). Tokyo, Japan is about 250 km from a convergent plate boundary, Seoul, South Korea is about 1800 km from a transform plate boundary. Each of these cities plots as a separate box as shown on Figure 1.3. As you draw your boxes, label each with the name of the corresponding city. 5. Explain your histogram and some general geographic patterns by answering the following questions in the spaces below. a. What does this chart say about the general distribution of Earth's population with respect to proximity to active plate boundary regions? b. Consider those cities that are within 500 km of an active plate boundary. How many are close to a convergent plate boundary? Name them. How many are close to a transform plate boundary? Name these. How many are close to a divergent plate boundary? Name them. c. What percentage of your 30 cities are located on coastlines? Considering what you know about world history, how would you explain this relatively large number? d. How many of your coastal cities are located within 500 km of a plate boundary? How many are within 1000 km?