Surface Water

Front

Tributary

Back

A smaller stream that feeds into a larger one.

Front

Source

Back

The origin and the highest elevation of a stream.

Front

Waterfall

Back

Place where water flows over a vertical drop in the course of a river.

Front

Meander

Back

A wide, looping bend in a low-gradient stream.

Front

Mouth

Back

The point at which a stream empties into another body of water (ocean, lake, pond, or another stream).

Front

Stream

Back

A small, flowing body of water that moves across the land.

Front

River

Back

A large, flowing body of water that usually empties into an ocean or sea.

Front

Watershed

Back

An area of land that drains into a particular stream, river, or lake.

Front

Floodplain

Back

An area of land adjacent to a river that is subject to flooding.

Front

Estuary

Back

A coastal area where freshwater from rivers meets and mixes with saltwater from the ocean.