4 Plains Coastal Plains Exposed region of the continental shelf. The continental shelf is the part of the continent that extends into the ocean.Size varies over time with changes in sea level.Characterized by low hills, swamps, and marshes.
5 Plains Interior Plains Found in the interior of continents. Thick, fertile soil.
6 Plateaus Flat, raised areas of land with steep sides. Plateaus Consist of horizontal layers of rock that have been slowly uplifted.Often cut by canyons formed by rivers.Plateaus