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18 Cards in this Set

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Groundwater
The water beneath the Earth's surface
Source
Place where a river begins
Channel
The deepest part of a river or other body of water
Mouth
Place where a river empties into some larger body of water
What are the three main parts of a river>
Source, channel, mouth
Tributaries
A stream or river that flows into a larger stream or river
River system
A river and its tributaries
Drainage basin
Land drained by a river system
Erosion
Wearing away of the Earth's surface
Floodplain
Low flat land along a river
Delta
Triangle-shaped land at a river's mouth.
How are the rivers in the Great Basin different from most other rivers in the United States?
They flow into the low-lying land and have nowhere to go. Some rivers dry up; others flow into shallow muddy pools.
How does a river erode the land?
A river's current sweeps rocks and sand and soil down the river. It scrapes along the river bed and banks and carves a deep and wide path.
Levee
High wall made of earth
Dam
A wall built across a river to hold back water
How does the river build up the land?
It drops silt (fine sand and soil) at the mouth and if there is no strong current to carry it away, it builds up.
What have people done to control flooding on rivers?
Built levees and dams
Why did levees fail to protect some areas against flooding?
The levees broke