State and Regional Geography

Physical Geography: Landforms and Water#

Geography is the study of Earth's physical features and how people live within and interact with them. Physical geography focuses on natural features — the landforms, water bodies, and climate that make a region distinct.

Major Landform Types#

Mountains: High elevation, rocky terrain. Found in the Rocky Mountains (west), Appalachians (east), and Cascades (northwest). Mountains create barriers to movement, receive heavy snowfall, and often divide drainage systems.

Plains: Large areas of flat or gently rolling land. The Great Plains stretch through the central US. Plains have fertile soil and are excellent for farming and settlement.

Plateaus: Elevated, relatively flat land. The Colorado Plateau in the southwest is famous for dramatic canyons carved by rivers.

Valleys: Low areas between hills or mountains, often formed by rivers. Many valleys have fertile soil and are ideal for farming.

Deserts: Dry regions with minimal precipitation. The Mojave, Sonoran, and Chihuahuan deserts are found in the American Southwest.

Coastal plains: Flat, low-lying land along coastlines. The Atlantic and Gulf Coastal Plains run along the eastern and southern US.

Major Bodies of Water#

Rivers: The Mississippi River is the largest river system in North America. Rivers provide transportation, water supply, and fertile floodplains.

Great Lakes: Five large freshwater lakes (Superior, Michigan, Huron, Erie, Ontario) — the largest freshwater surface in the world by area.

Bays and estuaries: Semi-enclosed coastal waters where rivers meet the sea — Chesapeake Bay, San Francisco Bay.

Oceans: The US is bordered by the Atlantic Ocean (east), Pacific Ocean (west), Gulf of Mexico (south), and Arctic Ocean (north — Alaska).