The roles of animals in soil formation.

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Chapter 12, Problem 5KTC

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The roles of animals in soil formation.

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Calculate the gradient, or slope, of this portion of the Missouri River by following the steps below: Step 1: Locate a contour line that crosses the river. Note: An index contour crosses the river in Section 26 (lower left portion of the map). Follow the index contour to the right to establish its elevation. Elevation: ________ feet Step 2: Locate a second index contour that crosses the river. Note: Look in Section 11, between the letters V and E in the word RIVER. What is its elevation? Elevation: ________ feet Step 3: Use a string and the bar scale to measure the approximate distance (to the nearest mile) between these two index contours. Distance: ________ feet Step 4: Calculate the gradient of the river by using the following formula: Gradient Difference in elevation (feet) / Distance (miles) Gradient: ________ feet per mile

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