Based on the analysis of the provided image, the problem is to understand how a topographic map is represented as a cross-section profile. The solution involves interpreting the contour lines on the map and correlating them with the elevation changes shown in the profile graph.
Here is the step-by-step explanation:
1.
Understanding the Topographic Map:
* The upper part of the image is a topographic map, which uses contour lines to represent elevation.
* Each contour line connects points of equal elevation. The numbers (10, 20, 30, 40, 50) indicate the height in meters (or other units) above a reference point.
* The map shows two distinct hill features:
* A hill on the left, where the innermost contour line is labeled "40". This means the peak of this hill is at an elevation of 40 meters.
* A hill on the right, where the innermost contour line is labeled "50", surrounded by a "40" contour line. This indicates the peak of this hill is at 50 meters, making it higher than the left hill.
2.
Understanding the Cross-Section Profile:
* The lower part of the image is a cross-section profile, which is a side-view representation of the terrain along the straight line A-B drawn on the map.
* The horizontal axis represents the distance from point A to point B.
* The vertical axis represents the elevation.
3.
Correlating the Map and the Profile:
* The solid black line in the profile graph traces the actual shape of the land along the A-B transect.
* As you move from point A to point B, the profile first rises to a peak. This corresponds to crossing the hill on the left side of the map. The height of this peak on the graph is approximately 40 units, matching the 40-meter contour line on the map.
* After descending from the first peak, the profile rises again to a second, higher peak. This corresponds to crossing the hill on the right side of the map. The height of this second peak on the graph is approximately 50 units, matching the 50-meter contour line on the map.
* The dashed vertical lines connect specific locations on the map to their corresponding positions on the profile, visually confirming that the profile accurately depicts the elevation changes along the A-B line.
In summary, the problem demonstrates how to read a topographic map and visualize its three-dimensional form through a two-dimensional cross-section profile. The profile correctly translates the contour lines into a graphical representation of the hills' heights and shapes along the specified path from A to B.
Parent Tip: Review the logic above to help your child master the concept of topographic profile worksheet.
