Contour intervals – difference in elevation between any two contour lines on a topographic map

 Contour lines – map symbol showing shape and/or change in elevation on a topographic map

 Topographic maps – map showing the shape and elevation of the land surface using contour lines

 Topography – the shape of the Earth’s surface and the way its physical features are arranged, especially in terms of their positions and elevations

Check Your Understanding

1. Describe to a partner or write in your journal what a contour interval is and how to determine elevation at specific points.