| A | B |
|---|
| Continental drift theory | Alfred Wegner’s explanation of continents slowly moving and changing their positions relative to one another |
| 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 |
| Plate tectonic theory | the outer most layer of the Earth (lithosphere) is divided into contiguous sections (plates) that move relative to each other causing continental drift, seafloor spreading, and the formation of major physical features of the Earth’s surface |
| 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 |
| Alfred Wegner | Scientist who developed the Theory of Plate Tectonics |
| Subduction | When one plate moves beneath another one |
