TeXes Science Practice Test

What signifies the elevation of a volcanic crater on a topographic map?

1. A contour line that has hachure

2. A solid line with equal intervals

3. A shaded relief pattern

4. A dashed line with variable thickness

The correct answer is: A contour line that has hachure

A volcanic crater is typically indicated on a topographic map by a contour line that has hachures, which are short lines that point toward lower elevation. This signifies that the area surrounding the crater is at a higher elevation, illustrating the depression created by the volcanic activity. The hachured contour lines visually convey the steepness and depth of the crater, allowing for a clear representation of its topography compared to higher surrounding areas. While other options might depict different geographical features or attributes, they do not specifically represent a volcanic crater. A solid line with equal intervals represents standard contour lines, indicating consistent elevation changes over an area without showing depressions. A shaded relief pattern illustrates elevation through variations in shading but does not distinctly outline a volcanic feature. A dashed line with variable thickness may represent specific boundaries or features, but does not convey elevation or depth in the same effective way as hachured contours.