EBK NATURAL DISASTERS
10th Edition
ISBN: 8220102805361
Author: Abbott
Publisher: YUZU
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Chapter 17, Problem 11QR
To determine
The series of life-threatening events that occur when an asteroid of 10 Km diameter slams into Earth.
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1. Draw an arrow on the map to indicate the direction that the main river, the Genesee, is flowing. (Hint: Use the elevations of the two bench marks [BM] next to the river near the top and bottom of the map to determine your answer.)
2. Use the BM elevations from Question 1 to calculate the approximate gradient of the Genesee River.
3. Use Figure 8.9 to draw a profile along line A-A". Use only index contour lines.
4. Approximately how many feet is the Genesee River above sea level?
5. The path of the Genesee River can best be described as which of the following: a straight course or a meandering course?
6. Which phrase most accurately describes most of the areas beyond the Genesee River Valley: very broad and flat or relatively hilly and dissected?
7. Use the fractional scales on the Angelica topographic map and the Portage, Montana, map (page 136) to answer the following.
a. What is the fractional scale for the Angelica map?
b. How does this compare to the fractional scale for the…
1. Compare the stereogram in Figure 8.7 to the map in Figure 8.6. Then, on the topographic map, outline the area shown in the photo.
2. Is the terrain in Section 14, located on the west side of this map, relatively flat or hilly? Explain.
3. Label the areas that topographically resemble Section 14 on the topographic map as "upland."
4. Describe the topography in the lower half of Section 17, located three sections east of section 14.
5. Section 17 contains a portion of the valley occupied by the Missouri River. Approximately what percentage of the area shown on the map is stream valley (similar to the lower half of Section 17) and what percentage is upland?
6. Which of the following best describes the shape of the Missouri River Valley along the line labeled D.-D': wide valley with a floodplain or steep-sided V-shaped valley with no floodplain?
Use the Portage, Montana, topographic map in Figure 8.6 (on page 136) and the stereogram in Figure 8.7 (on page 137) to complete the following.
1. Compare the stereogram in Figure 8.7 to the map in Figure 8.6. Then, on the topographic map, outline the area shown in the photo.
2. Is the terrain in Section 14, located on the west side of this map, relatively flat or hilly? Explain.
3. Label the areas that topographically resemble Section 14 on the topographic map as "upland."
4. Describe the topography in the lower half of Section 17, located three sections east of section 14.
5. Section 17 contains a portion of the valley occupied by the Missouri River. Approximately what percentage of the area shown on the map is stream valley (similar to the lower half of Section 17) and what percentage is upland?
6. Which of the following best describes the shape of the Missouri River Valley along the line labeled D.-D': wide valley with a floodplain or steep-sided V-shaped valley with no floodplain?…
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