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Instructions In the following problems you will compute the...

Instructions

In the following problems you will compute the gradients of Mauna Loa in Hawai'i, Mount Vsevidof in Alaska, and SP Mountain in Arizona. (You may also determine the elevation changes and distances needed to calculate these gradients by using Google Earth™.) The recommended starting point and distance to measure are given for all three volcanoes.


(Question #1) Using Map T-1, the "Hawaii, Hawaii," topographic map (scale 1:250,000; contour interval 200 feet), calculate the gradient of Mauna Loa (19 degrees 28' 17" N, 155 degrees 35' 41" W) along line AB, from the 5000 ft, contour (near Point A) toward the summit. On the edge of a piece of paper measure out a distance of 10 miles using the graphic map scale, and then determine the

elevation change over that distance.


Answer:

A) 6400(feet)/10(number of miles)=640(feet/mile)


B) 640(feet)/10(number of miles)=64(feet/mile)


C) 64000(feet)/100(number of miles)=6400(feet/mile)



(Question #2) Using Map T-2, the "Umnak, Alaska," topographic map (scale 1:250,000; contour interval 200 feet), calculate the gradient of Mount Vsevidof (53°07′35″N, 168°41′16″W) along line CD, from the 1000′ contour (near Point C) toward the summit. (On the edge of a piece of paper you can measure out a distance of 2 miles using the graphic map scale inside the front cover of the Lab Manual, and then determine the elevation change over that distance.)


Answer:

A) 36000(feet)/20(number of miles)=18000(feet/mile)


B) 3600(feet)/2(number of miles)=1800(feet/mile)


C) 360000(feet)/200(number of miles)=180000(feet/mile)


(Question #3) Using Map T-22b, the "SP Mountain, Arizona," quadrangle (scale 1:24,000; contour interval 40 feet), calculate the gradient of SP Mountain (35 degrees 34' 56" N, 111 degrees 37' 55" W) from the

north base of the cone (at the 6200 ft contour) toward the crater rim. On the edge of a piece of paper measure out a distance of 0.2 miles using the graphic map scale, and then determine the elevation change over that distance.


Answer:

A) 640(feet)/0.2(number of miles)=3200(feet/mile)


B) 320(feet)/0.4(number of miles)=1600(feet/mile)


C) 64(feet)/0.02(number of miles)=320(feet/mile)



(Question #4) Which of the three volcanoes has the steepest slope?


Answer:

A) SP Mountain


B) Mauna Loa


C) Vsevidof


(Question #5) Why? (please explain your reasoning in writing on question #4 above)


Answer: ???


(Question #6) Which of the three volcanoes has the gentlest slope?


Answer:

A) Mauna Loa


B) Vsevidof


C) SP Mountain


(Question #7) Why? (please explain your reasoning in writing on question #6 above)


Answer: ???

Answer & Explanation
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