On a topographic map, contour lines that are closer together indicate a steeper slope.

Here's why:

* Contour lines represent points of equal elevation.

* Closely spaced contour lines mean the elevation changes rapidly over a short distance.

* Widely spaced contour lines mean the elevation changes gradually over a longer distance.

Imagine walking up a hill. If you encounter closely spaced contour lines, you'd be walking uphill at a steeper incline. If the lines are farther apart, you'd be walking uphill at a gentler slope.