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Earth Science Chapter 13
Vocabulary for Chapter 13
25
Science
9th Grade
10/05/2009

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Term
Base Level
Definition
level of the body of water into which a stream flows
Term
Bed Load
Definition
sand, pebbles, and boulders that are moved along the bed, too heavy to be carried in suspension
Term
Capacity
Definition
total amount of sediment a stream can carry
Term
Competence
Definition
maximum size of a particle a stream can carry
Term
Delta
Definition
Fan shaped deposit formed when a river flows into a quiet or large body of water
Term
Deposition
Definition
process by which materials are dropped such as sand, silt in a stream
Term
Discharge
Definition
volume of water that passes a certain point in a stream/river in a given amount of time.
Term
Divide
Definition
High land that separates one drainage basin from another
Term
Drainage Basin
Definition
all the land that drains into the river either directly or from tributaries - a watershed
Term
Flash Flood
Definition
sudden flood usually caused by intense, heavy rainfall
Term
Flood
Definition
river overflows its banks
Term
Flood Plain
Definition
wide, level area that borders a river and is covered by its water during a flood
Term
Gradient
Definition
slope or incline of an area of land or of a stream
Term
Headward Erosion
Definition
process in which land is worn away at the head of a gully or stream
Term
Load
Definition
Eroded rock and soil that are transported downstream by a river
Term
Meander
Definition
Broad, looping bends in a river
Term
Natural Levees
Definition
Elevated ridges along a river's bank formed by the deposition of the river's sediment load
Term

Oxbow Lakes

 

Definition

Cresent shaped body of water formed when sediment cuts

 off a meander from a river

Term
Pothole
Definition
Deep oval or circular basin cut into a stream or river bed by abrasion from sand, rock, pebbles
Term
River System
Definition
a river and all its tributaries
Term
Stream Piracy
Definition
Diversion of the upper part of one stream by the headward growth of another stream
Term
Suspension
Definition
rock materials carried by a river are stirred up and kept from sinking by stream flow
Term
Tributary
Definition
stream that runs into another stream or river
Term
Watershed
Definition
all the land that drains into the river either directly or through its tributaries; a drainage basin
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