2. The Appalachian Plateau is a region of gently rolling hills and plateaus. This region includes the Allegheny Plateau and the Pocono Plateau.
3. The Atlantic Coastal Plain is a region of flat, low-lying land that borders the Atlantic Ocean. This region includes the Delaware Coastal Plain and the Chesapeake Bay Coastal Plain.
4. The Piedmont is a region of rolling hills and valleys that lies between the Appalachian Mountains and the Atlantic Coastal Plain. This region includes the Piedmont Province.
5. The Erie Drift Plain is a region of flat, low-lying land that borders Lake Erie. This region is composed of glacial drift, which is sediment that was deposited by glaciers.