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Erosion and Deposition
Chapter 3
28
Science
8th Grade
11/05/2009

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Term
sediment
Definition
the material which is moved by erosion
Term
erosion
Definition
when natural forces move rock and soil from one place to another. landslides, gravity, running water, glaciers and waves and wind can all cause erosion
Term
deposition
Definition
when the sediment is laid down in a new place.
Term
mass movement
Definition
landslides, mudslides, slump and creep are all examples. This is when lots of sediment is moved downhill.
Term
gully
Definition
large groove or channel in the soil that carries runoff after a rainstorm
Term
runoff
Definition
all the rest of the water that moves over the surface of the Earth
Term
rill
Definition
tiny groves in the soil from the runoff. draw a picture:
Term
stream and river
Definition
a channel which water runs through is a stream. A river is a large stream.
Term
tributary
Definition
a stream that flows into a larger stream. Draw a picture:
Term
drainage basin
Definition
the land area which has water that flows into a river and the tributaries. Draw a picture:
Term
divide
Definition
the high ground between 2 drainage basins. Draw a picture:
Term
flood plain
Definition
the flat, wide area along a river. This is the land that would flood if the river gets too full
Term
meander
Definition
a bend in a river like a loop. Draw a picture:
Term
oxbow lake
Definition
when a river floods, an oxbow lake may form. Draw a picture:
Term
oxbow lake
Definition
when a river floods, an oxbow lake may form. Draw a picture:
Term
alluvial fan
Definition
It looks like a fan. It is a wide sloping deposit of sediment that forms when a stream flows down from a mountain range.
Term
delta
Definition
sediment that is deposited when a river flows into an ocean or lake.
Term
groundwater
Definition
water under ground!
Term
stalactite
Definition
In a cave, the deposit that looks like an icicle. Draw a picture:
Think tite=ice
Term
stalagmite
Definition
inside a cave, the cone-shaped deposits that build up on the floor.
Term
karst topography
Definition
A narea that has lots of caverns, caves and sinkholes.
Term
Energy
Definition
The ability to do work or cause change
Term
potential energy
Definition
energy that is stored and waiting to be used. When you are on the line of scrimage you have lots of potential energy waiting to be used to tackle someone.
Term
kinetic energy
Definition
the energy an object has due to its motion. When you are running down the field, you are using kinetic energy
Term
Abrasion
Definition
when rocks are worn away by grinding action. This happens when bits of sediment are bumped again and again.
Term
load
Definition
the amount of sediment that a river carries
Term
friction
Definition
the force of of moving one surface against another. Rub your hands together. This is friction
Term
turbulence
Definition
Instead of flowing in one direction, the water in a river flows many different ways.
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