Terms in this set (53)
Major Agent of Erosion
Moving water is the major agent of erosion that has shaped Earth's land surface
remaining water that moves over Earth's surface
Tiny grooves in the soil caused by runoff.
Is a large groove, or channel, in the soil that carries runoff after a rainstorm
Is a channel along which water is continually falling down a slope
A large stream
Is a stream that flows into a larger stream
Is the land area from which a river and its tributaries collect their water
Is the high ground between two drainage basins
Erosion by Rivers
Through erosion, a river creates valleys, waterfalls, flood plains, meanders, and oxbow lakes
The flat, wide area of land along a river
Is a loop-like bend in the course of a river
Is a meander that has been cut off from the river
Deposition by Rivers
Creates landforms such as alluvial fans and deltas. It can also add soil to a river's flood plain
A wide, sloping deposit of sediment formed where a stream leaves a mountain range
Sediment deposited where a river flows into an ocean or lake builds a landform.
The term geologists use for underground water
A deposit that hangs like an icicle from the roof of a cave
Slow dripping builds up a cone shaped stalagmite from the cave floor
A region in which a layer of limestone close to the surface creates deep valleys, caverns, and sinkholes.
Ability to do work or cause change
Energy that is stored and waiting to use later
Energy an object has due to its motion
Work and Energy
As gravity pulls water down a slope, the water's potential energy changes to kinetic energy that can do work.
The wearing away of rock by a grinding action.
The amount of sediment that a river carries.
Is the amount the river drops toward sea level over a given distance.
Is the volume of water that moves past a point on the river in a given time.
How water Erodes and Carries Sediment
Most sediment washes or falls into the river as a result of mass movement and runoff. Other sediment erodes from the bottom or sides of the river.
The Speed of a River and Sediment Load
A river's slope, volume of flow, and the shape of the streambed all affect how fast the river flows and how much sediment it can erode.
Force that opposes the motion of one surface as it moves across another surface. Affects a river's speed. Deep rivers have less friction so the speed of the river is faster.
A type of movement of water in which, instead of moving downstream, the water moves every which way. Slows down a river's flow but has a greater power to erode.
Any large mass of ice that moves slowly over land.
A long, narrow glacier that forms when snow and ice buildup high in a mountain valley.
A glacier that covers much if a continent or large island.
Times when continental glaciers covered large parts of Earth's surface.
The two processes by which glaciers erode the land are plucking and abrasion.
As a glacier flows over the land, it picks up rocks.
When a glacier melts, it deposits the sediment it eroded form the land, creating various landforms.
Mixture of sediments that a glacier deposits directly on the surface.
A ridge formed by the till deposited at the edges of a glacier.
A small depression that forms when a chunk of ice is left in glacial till.
Is the process by which natural forces move weathered rock and soil from one place to another.
The material moved by erosion.
Occurs where the agents of erosion lay down sediment. Changes the shape of the land.
Weathering, erosion, and deposition act together in a cycle that wears down and builds up Earth's surface.
Is the force that moves rock and other materials downhill.
Caused by gravity, any one of several processes that move sediment downhill.
4 types: landslides, mudslides, slump, and creep
Most destructive, occurs when rock and soil slide quickly down a steep slope.
Is the rapid downhill movement of a mixture of water, rock and soil.
A mass of rock and soil suddenly slips down a slope, the material moves down in one large mass.
Is the very slow downhill movement of rock and soil.
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