Which statement about contour line spacing on a site plan is true?

Which statement about contour line spacing on a site plan is true?

• A. They indicate slope by color shading
• B. They indicate slope, with closer spacing indicating a steeper slope
• C. They indicate only plan scale
• D. They indicate soil moisture content

Answer: (B)

Contour line spacing shows how steep the land is. When contour lines are close together, the slope is steep; when they are spaced farther apart, the slope is gentler. This is because each line marks a constant elevation, and tightly packed lines indicate a rapid elevation change over a short distance. Color shading or plan scale aren’t determined by the spacing of contour lines, and soil moisture content isn’t conveyed by how closely the lines are drawn.

Contour line spacing shows how steep the land is. When contour lines are close together, the slope is steep; when they are spaced farther apart, the slope is gentler. This is because each line marks a constant elevation, and tightly packed lines indicate a rapid elevation change over a short distance. Color shading or plan scale aren’t determined by the spacing of contour lines, and soil moisture content isn’t conveyed by how closely the lines are drawn.