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Jason Vocabulary
Jason
31
Science
5th Grade
02/06/2006

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Term
erosion
Definition
the removal of soil and rock material by wind or rain
Term
brackish
Definition
a mix of salt and fresh water
Term
delta
Definition
a deposit of sediments, usually triangular in shape, that forms at the mouth of a river when the river speed decreases and sediment settles out of the water
Term
bioshpere
Definition
the part of the Earth in which life exists
Term
atmoshpere
Definition
the envelope of gases surronding the Earth
Term
geoshpere
Definition
Earth's land surface and interior
Term
hydroshpere
Definition
the part of Earth's surface consisting of liquid and frozen water
Term
river system
Definition
the network that includes all the waters feeding into the main river or river system and all the water branching out from it
Term
contiguous
Definition
touching along an edge; next to
Term
stem
Definition
the main channel of a river
Term
sea level
Definition
the average level of the surface of Earth's oceans
Term
distributary
Definition
a river channel that flows away from the river
Term
floodplain
Definition
the land that a river floods when it overflows its banks
Term
flood
Definition
an overflowing of water onto a normally dry area
Term
sediment
Definition
clay, silt, and other materials that are suspended ina river and eventually settle out of the water as the water slows down
Term
deposition
Definition
the process by which sediments settle out of water
Term
mouth
Definition
the place where a river flows into another body of water
Term
tributary
Definition
a river or stream that flows into a larger river or lake
Term
drainage basin
Definition
the area drained by a river and all of its tributaries
Term
source
Definition
the area where a river begins
Term
subsidence
Definition
the process by which land compacts and sinks over time
Term
salinity
Definition
a measurement of the amount of salt dissolved in water
Term
levee
Definition
a raised bank of earth that protects nearby land from flooding
Term
dredged
Definition
made deeper by removign sediment and other material
Term
breached
Definition
split into multiple parts
Term
spillway
Definition
a passage built to safely contain water that overflows the banks and levees of a river
Term
artificial reef
Definition
a ridge of sand or an arragement of rocks or other materials placed near the water's surface by humans to simulate a natural reef
Term
freshwater reintroduction
Definition
diverting fresh river water along with its nutrients and sediments into a coastal ecosystem where they once flowed
Term
sediment reitroduction project
Definition
a project designed to transport enough sediment into wetlands to prevent additional land loss in the system
Term
stakeholder
Definition
a person living and working in an area that will be affected by a decision about that area
Term
pipeline slurry
Definition
a method of rebuilding marshes or swamps that usesmovable pipeline systems to transport sediment sediment from a river directly to areas that most need the sediment
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