Earth's Surface Systems
uniformitarian
A geologic principle that the same geologic processes that operate today operated in
the past to change Earth's surface
erosion
The process by which water, ice, wind or gravity moves weathered particles of rock and
soil
mechanical weathering
The type of weathering in which rock is physically broken into smaller pieces.
chemical weathering
The process that breaks down rock through chemical changes.
soil
The loose, weathered material on Earth's surface in which plants can grow.
, humus
Dark colored organic material in soil
sediment
Small, solid pieces of material that come from rocks or the remains of organisms; earth
material deposited by erosion.
deposition
Process in which sediment is laid down in new locations.
mass movement
Any one of several processes by which gravity moves sediment downhill
deflation
The process by which wind removes surface materials.
sand dune
A deposit of wind blown sand.
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