Friday, April 17, 2009

Lesson 3 Rivers and Streams

Bank- The rising ground that borders a river or stream.

Flood Plain- The flat area of land on both sides of the river. It forms from layers of sediment (silt, land, gravel) left behind each time a river overflows it's banks. Soil makes good farmland.

Bits and pieces of particles carried by the water chip away at rocks.

Abrasion- Scratching and scraping

Meanders- Streams in the mature stage develop broad curves called meanders.

Watershed- the area from which water is drained, or the region that contributes water to a river or a river system.

Arroyo- a small water-carved channel with steep banks that is located in a dry area.

Delta- the triangular-shaped deposite of soil particles that forms where the stream enters the larger body of water is called a delta.