Topography Review

A line on a topographic map that connects points of equal elevation.

What is the name for every 5th contour line on a topographic map that is darkened and labeled with the elevation?

When contour lines form a V or U shape it usually indicates the presence of a __________.

A point on a topographic map (usually not on a contour line) labeled with a specific elevation and usually has a triangle, BM, or + symbol next to it indicates a/an ________.