Basin An area that is lower than surrounding land areas; can be filled with water

A part of a larger body of water that extends into the land Bay A part of a larger body of water that extends into the land

A small, high, flat topped landform with cliff like sides Butte A small, high, flat topped landform with cliff like sides

Canyon A deep, narrow valley with steep sides; often has a stream flowing through it

A large waterfall or steep rapids Cataract A large waterfall or steep rapids

Delta A plain at the mouth of the river, often triangular in shape, formed when material is deposited by flowing water

Flood Plain A broad plain on either side of a river, formed when sediment settles during floods

A huge, slow moving mass of snow and ice Glacier A huge, slow moving mass of snow and ice

An area that rises above surrounding land and has a rounded top Hill An area that rises above surrounding land and has a rounded top

An area of land completely surrounded by water Island An area of land completely surrounded by water

A narrow strip of land that connects two larger areas of land Isthmus A narrow strip of land that connects two larger areas of land

A high, flat topped landform with cliff like sides Mesa A high, flat topped landform with cliff like sides

Mountain A landform that rises steeply at least 2000 feet above surrounding land, usually wide at the bottom and rising to a narrow peak or ridge

A gap between mountains Mountain Pass A gap between mountains

Peninsula An area of land almost completely surrounded by water and connected to the mainland by a narrow strip of land

A large area of flat or gently rolling land Plain A large area of flat or gently rolling land

Plateau A large, flat area that rises above the surrounding land; at least one side has a steep slope

The point where a river enters a lake or sea River Mouth The point where a river enters a lake or sea

A narrow stretch of water that connects two larger bodies of water Strait A narrow stretch of water that connects two larger bodies of water

A river or stream that flows into a larger river Tributary A river or stream that flows into a larger river

Valley A low stretch of land between mountains or hills, land that is drained by a river

Volcano An opening in Earth’s surface through which molten rock, ash, and gases from Earth’s interior escape