0.2 ft/ft F The slope between X and Y might not be the steepest slope in the area. Circle the area on the map that has the steepest slope E In fact, it gets much steeper between X and Y along the slope to B. What is the gradient between X and Y? over an elevation change of at least 80 feet. G REFLECT & DISCUSS There is no need to walk in a straight line from A to B, so pick a path within the map area that has a gentle overall slope to the top of the knob at point B while always moving upslope. Your map should be about a mile long, give or take a thousand feet or so. Use a pencil to sketch that path with a dashed curve. Share your proposed path with other students and listen to their explanations of why they chose the paths they drew. 262 Name: Relief and Gradient (Slope) Analysis Course/Section: Activity 9.5 Date: activity sheet and then calculate its vertical exaggeration. Learning GOAL You will construct a topographic profile from a topographic map using the profile box provided on the On a visit to Yosemite, you and some friends find a nice place along the Merced River for a picnic. You have a topographic contour map (Fig. A9.5.1) in which the index contours are labeled in feet. From your resting place at point A, you decide to gain a better vantage point by walking up to point B. 6600 -6200 B 6400 Y 6200- Merced River A⚫ North 1000 feet Figure A9.5.1 A Using the labeled elevations of the index contours as your guide, what is the contour interval (the elevation difference between two adjacent contours) in Fig. A9.5.1? 20 ft B You have a bar scale on the map that indicates a distance of 1000 ft on the ground in your picnic area. How long is that bar scale on the map in mm? 36 mm What is the horizontal distance from A to B measured along a straight line in ft? (Hint: Measure the distance from A to B using a metric ruler on the map, and then use your measurement of how many mm on the map equal 1000 ft in the field to find the answer using proportions.) Show your work. 1500 ft 45 30 D What is the average gradient (elevation change divided by horizontal distance, both expressed in ft) along a straight line from A to B? Show your work.. 233 ft/ft (25) • 1000 ft = 1500 6600-6250 350 =0.233 1600 261

0.2 ft/ft F The slope between X and Y might not be the steepest slope in the area. Circle the area on the map that has the steepest slope E In fact, it gets much steeper between X and Y along the slope to B. What is the gradient between X and Y? over an elevation change of at least 80 feet. G REFLECT & DISCUSS There is no need to walk in a straight line from A to B, so pick a path within the map area that has a gentle overall slope to the top of the knob at point B while always moving upslope. Your map should be about a mile long, give or take a thousand feet or so. Use a pencil to sketch that path with a dashed curve. Share your proposed path with other students and listen to their explanations of why they chose the paths they drew. 262 Name: Relief and Gradient (Slope) Analysis Course/Section: Activity 9.5 Date: activity sheet and then calculate its vertical exaggeration. Learning GOAL You will construct a topographic profile from a topographic map using the profile box provided on the On a visit to Yosemite, you and some friends find a nice place along the Merced River for a picnic. You have a topographic contour map (Fig. A9.5.1) in which the index contours are labeled in feet. From your resting place at point A, you decide to gain a better vantage point by walking up to point B. 6600 -6200 B 6400 Y 6200- Merced River A⚫ North 1000 feet Figure A9.5.1 A Using the labeled elevations of the index contours as your guide, what is the contour interval (the elevation difference between two adjacent contours) in Fig. A9.5.1? 20 ft B You have a bar scale on the map that indicates a distance of 1000 ft on the ground in your picnic area. How long is that bar scale on the map in mm? 36 mm What is the horizontal distance from A to B measured along a straight line in ft? (Hint: Measure the distance from A to B using a metric ruler on the map, and then use your measurement of how many mm on the map equal 1000 ft in the field to find the answer using proportions.) Show your work. 1500 ft 45 30 D What is the average gradient (elevation change divided by horizontal distance, both expressed in ft) along a straight line from A to B? Show your work.. 233 ft/ft (25) • 1000 ft = 1500 6600-6250 350 =0.233 1600 261

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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0.2 ft/ft
F The slope between X and Y might not be the steepest slope in the area. Circle the area on the map that has the steepest slope
E In fact, it gets much steeper between X and Y along the slope to B. What is the gradient between X and Y?
over an elevation change of at least 80 feet.
G REFLECT & DISCUSS There is no need to walk in a straight line from A to B, so pick a path within the map area that
has a gentle overall slope to the top of the knob at point B while always moving upslope. Your map should be about a mile long,
give or take a thousand feet or so. Use a pencil to sketch that path with a dashed curve. Share your proposed path with other
students and listen to their explanations of why they chose the paths they drew.
262

Transcribed Image Text:Name: Relief and Gradient (Slope) Analysis Course/Section: Activity 9.5 Date: activity sheet and then calculate its vertical exaggeration. Learning GOAL You will construct a topographic profile from a topographic map using the profile box provided on the On a visit to Yosemite, you and some friends find a nice place along the Merced River for a picnic. You have a topographic contour map (Fig. A9.5.1) in which the index contours are labeled in feet. From your resting place at point A, you decide to gain a better vantage point by walking up to point B. 6600 -6200 B 6400 Y 6200- Merced River A⚫ North 1000 feet Figure A9.5.1 A Using the labeled elevations of the index contours as your guide, what is the contour interval (the elevation difference between two adjacent contours) in Fig. A9.5.1? 20 ft B You have a bar scale on the map that indicates a distance of 1000 ft on the ground in your picnic area. How long is that bar scale on the map in mm? 36 mm What is the horizontal distance from A to B measured along a straight line in ft? (Hint: Measure the distance from A to B using a metric ruler on the map, and then use your measurement of how many mm on the map equal 1000 ft in the field to find the answer using proportions.) Show your work. 1500 ft 45 30 D What is the average gradient (elevation change divided by horizontal distance, both expressed in ft) along a straight line from A to B? Show your work.. 233 ft/ft (25) • 1000 ft = 1500 6600-6250 350 =0.233 1600 261

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