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Unit 3 Vocabulary

TermDefinition
Weathering the physical and chemical processes that break down or wear away objects
Physical weathering weathering processes that naturally break rocks into smaller pieces
Abrasion the grinding away of objects by particles carried by the wind, water, or ice
Ice wedging the breaking apart of objects by the freezing and thawing of water
Chemical weathering weathering processes that changes the materials that are part of a rock into new materials
Acid rain when rain mixes with pollutants
Oxidation when oxygen combines with other elements
Erosion the removal and transport of weathered material
Rounding when rock fragments bump against each other during erosion
Sorting the separating of items into groups based on properties
Deposition the laying down or settling of eroded materials
Meander a broad, C-shaped curve in a stream
Longshore current a current that flows parallel to the shoreline
Delta a large deposit of sediment that forms where a stream enters a large body of water
Dune a pile of windblown sand
Loess a crumbly, windblown deposit of silt and clay
Mass wasting the downhill movement of a large mass of rocks or soil due to gravity
Landslide the rapid downhill movement of soil, loose rocks, and boulders
Slump when blocks of material move down slope on a curved surface
Creep when material moves downhill too slowly to be noticeable
Talus a pile of angular rocks and sediment from a rockfall
Glacier a large mass of ice that formed on land and moves slowly across Earth's surface
Alpine glacier glaciers that form in mountains and flow downhill
Ice sheet glaciers that cover large areas of land and move outward from central locations
Till a mixture of various sizes of sediment deposited by a glacier
Moraine a mound or ridge of unsorted sediment deposited by a glacier
Outwash layered sediment deposited by streams of water that flow from a melting glacier
Created by: K.Hoffman
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