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Earth's Surface Ch 3
Interactive Science Series
34
Science
6th Grade
03/07/2017

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Term
erosion
Definition
the process by which natural forces move weathered rock and soil from one place to another
Term
sediment
Definition
pieces of rock, soil, or the remains of plants and animals
Term
deposition
Definition
occurs when the agents of erosion deposit, or lay down, the sediment
Term
gravity
Definition
the force that pulls you downward
Term
mass movement
Definition
one of the several processes that moves sediment downhill
Term
runoff
Definition
water that moves over the land while carrying particles
Term
rill
Definition
tiny grooves in the soil
Term
gully
Definition
a large groove, or channel, in the soil that carries runoff after a rainstorm
Term
stream
Definition
a channel along which water is continually flowing down a slope
Term
tributary
Definition
a stream or river that flows into a larger river
Term
flood plain
Definition
the flat, wide area of land along a river
Term
meander
Definition
a loop-like bend in the course of a river
Term
oxbow lake
Definition
a meander that has been cut off from the river
Term
delta
Definition
a built up landform formed by sediment depositing where a river meets an ocean or lake
Term
alluvial fan
Definition
a wide, sloping deposit of sediment formed where a stream leaves a mountain range
Term
groundwater
Definition
underground water
Term
stalactite
Definition
a deposit that hangs like an icicle from the roof of a cave
Term
stalagmite
Definition
a cone-shaped deposit that builds up from a cave floor
Term
karst topography
Definition
a region in which a layer of limestone close to the surface creates deep valleys, caverns, and sinkholes
Term
glacier
Definition
a large mass of ice that moves slowly over land
Term
continental glacier
Definition
a glacier that covers much of a continent or large island
Term
ice age
Definition
times when continental glaciers have covered larger parts of Earth's surface
Term
valley glacier
Definition
a long, narrow glacier that forms when snow and ice build up high in a mountain valley
Term
plucking
Definition
the process by which a glacier picks up rock as it flows over land
Term
till
Definition
the mixture of sediments that a glacier deposits directly on the surface
Term
moraine
Definition
a ridge formed by the till deposited at the edges of a glacier
Term
kettle
Definition
a small depression that forms when a chunk of ice is left in glacial till
Term
headland
Definition
the part of the shore that sticks out into the ocean
Term
beach
Definition
an area of wave-washed sediment along a coast
Term
longshore drift
Definition
the process of beach sediment moving down the beach with the current
Term
spit
Definition
a beach that projects like a finger out into the water
Term
deflation
Definition
the process by which wind removes surface materials
Term
sand dune
Definition
a deposit of windblown sand
Term
loess
Definition
fine pieces of windblown sediment
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