27 terms

Weathering and Erosion Lansing MS

Weathering and erosion study guide for Lansing Middle School
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carbonic acid
A natural acid that causes chemical weathering
cold climate
Mechanical weathering is more rapid in this climate
climate
An area's ________________ affects the rate of weathering.
weathering
Breaking down of rocks
erosion
The process that wears away surface materials and moves them from one place to another.
ice wedging
Water freezing and thawing repeatedly in rocks
oxidation
The reaction of a material containing iron exposed to oxygen and water
mechanical weathering
breaks apart rocks by physical processes
chemical weathering
dissolves or changes minerals in rocks
sediment
eroded soil
loess deposits
very fine sediment that provides fertile soil for the Midwestern United States
abrasion
an erosional process often compared to sandblasting that polishes and pits rocks by windblown particles
creep
an erosional process that results in trees, walls, and fences leaning downhill
deposition
when sediments are dropped by agents of erosion
outwash
a deposit from a glacier's meltwater
dunes
deposits formed when windblown sediments pile up behind an obstacle
deflation
when small particles are removed by wind and heavier particles are left behind
till
a mixture of large and small materials deposited by a retreating glacier
mass movement
erosion that happens as gravity moves materials downhill
moraine
till deposited at the end and sides of a glacier when it is not moving forward
plucking
occurs when glacial ice melts and the water flows down into cracks in rocks, refreezes, and fractures the rock into pieces which are then added to the glacier
planting vegetation; building walls; inserting drainage
three things to reduce erosion on steep slopes
glacier
large mass of ice and snow moving on land under its own weight
Gravitational erosion probably caused by excessive rain and removal of vegetation.
Ice-wedging caused by water entering cracks, freezing, melting, reentering, refreezing, fracturing the rock.
Animal burrow causing mechanical erosion
Dust storm caused by wind erosion

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