Contour lines on a topographic map connect points of equal elevation. They show the shape and elevation of the land, like slices through a cake.

Here's why this is important:

* Elevation Changes: Contour lines tell you how steeply the terrain changes. Closely spaced lines mean a steep slope, while widely spaced lines indicate a gentle slope.

* Landform Identification: The pattern of contour lines helps you identify features like hills, valleys, ridges, and depressions.

* Planning: This information is crucial for hikers, engineers, and anyone working with the landscape.

Let me know if you'd like to know more about reading topographic maps!