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Science vocabulary 13.1-13.4
Science Chapter 13
24
Science
8th Grade
12/13/2012

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Term
Base level
Definition
the 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 of a stream and that are too heavy to be carried by suspension
Term
capacity
Definition
a measure of the total amount of sediment a stream can carry
Term
comptence
Definition
a measure that describes the maximum the size the particles a stream can carry
Term
delta
Definition
a fan shaped deposit that forms when a river flows into a quiet or large body of water such as a lake an ocean or an inland sea
Term
discharge
Definition
the volume of water that passes a certain point in a stream or river after a certain amount of time
Term
divide
Definition
the higher land that seperates one drainage basin from another
Term
drainage basin
Definition
all the land that drains into the river either directly or through its tributaries a watershed
Term
flash flood
Definition
a sudden flood usually caused by a sudden heavy rainfall
Term
flood
Definition
a phenomenon whereby a river flows into a bank
Term
flood plain
Definition
a wide level area that borders a river and it is covered by water during a flood
Term
gradient
Definition
the slope or incline of an area either land or a stream
Term
headword erosion
Definition
the process by which land is worn away at the head of gully or steam of a valley
Term
load
Definition
the eroded rock and soil materials that are carried by a river
Term
meanders
Definition
Broad loping bends in a river
Term
natural leaves
Definition
ELevated ridges along a river bank that forms by the depoisiton of the rivers sediment load
Term
oxbow lake
Definition
a crecent shaped body of water formed when sediments deposited by a river cut off a meander from a river
Term
pothole
Definition
deep oval or circular basins cut into a stream or river bed by abrasion from swirling sand pebbles and small boulders
Term
river system
Definition
a river and all its tributaries
Term
stream piracy
Definition
the diversion of the upper part of one stream by the headward growth of another stream
Term
suspension
Definition
a state in which rock materials carried by a river are stirred up and kept from sinking by the turbulence of stream flow
Term
tributary
Definition
a 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
Term
depositon
Definition
the process by which materials are dropped such as sand silts by a stream also the process which frost forms when water vapor condenses as a solid
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