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Science explore earth science
Erosion and Deposition
40
Science
6th Grade
12/15/2005

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Term
erosion
Definition
The process by which water, ice, wind, or gravity moves fragments of rock and soil.
Term
sediment
Definition
Small, solid particles of material from rocks or organisms which are moved by water or wind, resulting in erosion and deposition.
Term
deposition
Definition
The process by which sediment settles out of the water or wind that is carrying it, and is deposited in a new location.
Term
mass movement
Definition
Any one of several processes by which gravity moves sediment downhill.
Term
runoff
Definition
Water that flows over the ground surface rather than soaking into the ground.
Term
rill
Definition
A tiny groove in soil made by flowing water.
Term
gully
Definition
A large channel in soil formed by erosion.
Term
stream
Definition
A channel through which water is continually flowing downhill.
Term
river
Definition
A large stream.
Term
tributary
Definition
A stream that flows into a larger stream.
Term
drainage basin
Definition
The land area from which a river and its tributaries collect their water.
Term
divide
Definition
A ridge of land that separates one drainage basin or watershed from another.
Term
flood plain
Definition
A broad, flat valley through which a river flows.
Term
meander
Definition
A looping curve formed in a river as it winds through its flood plain.
Term
oxbow lake
Definition
The crescent-shaped, cutoff body of water that remains after a river carves a new channel.
Term
alluvial fan
Definition
A wide, sloping deposit of sediment formed where a stream leaves a mountain range.
Term
delta
Definition
A landform made of sediment that is deposited where a river flows into an ocean or lake.
Term
groundwater
Definition
Water that fills the cracks and pores in underground soil and rock layers.
Term
stalactite
Definition
A calcite deposit that hangs from the roof of a cave.
Term
stalagmite
Definition
A cone-shaped calcite deposit that builds up from the floor of a cave.
Term
karst topography
Definition
A type of landscape in rainy regions where there is limestone near the surface, characterized by caverns, sinkholes, and valleys.
Term
energy
Definition
The ability to do work or cause change.
Term
potential energy
Definition
Energy that is stored and available to be used later.
Term
kinetic energy
Definition
The form of energy an object has because of its motion.
Term
friction
Definition
The force that opposes the motion of one surface as it moves across another surface.
Term
turbulence
Definition
A type of movement of water in which, rather than moving downstream, the water moves every which way.
Term
abrasion
Definition
The grinding away of rock by other rock particles carried in water, ice, or wind.
Term
glacier
Definition
A huge mass of ice and snow that moves slowly over the land.
Term
continental glacier
Definition
A glacier that covers much of a continent or large island.
Term
ice ages
Definition
Cold time periods in Earth's history, during which glaciers covered large parts of the surface.
Term
plucking
Definition
The process by which a glacier picks up rocks as it flows over the land.
Term
till
Definition
The sediments deposited directly by a glacier.
Term
moraine
Definition
A ridge formed by the till deposited at the edge of a glacier.
Term
kettle
Definition
A small depression that forms when a chunk of ice is left in glacial till.
Term
beach
Definition
Wave-washed sediment along a coast.
Term
longshore drift
Definition
The movement of water and sediment along a beach caused by waves coming into shore at an angle.
Term
spit
Definition
A beach formed by longshore drift that projects like a finger out into the water.
Term
sand dune
Definition
A deposit of wind-blown sand.
Term
deflation
Definition
Wind erosion that removes surface materials.
Term
loess
Definition
A wind-formed deposit made of fine particles of clay and silt.
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