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Weathering
the disintegration and decomposition of material at or near the surface
Erosion
the incorporation and transportation of material by a mobile agent, usually water, wind, or ice
Mass wasting
the transfer of rock material downslope under the influence of gravity ( unlike the other external processes it takes seconds )
Mechanical weathering
Breaking of rocks into smaller pieces
Processes of mechanical weathering
Frost wedging, Unloading, Organisms, Jointing
Frost wedging
Expansion and contraction of water as it freezes and thaws in cracks of rocks, leading to their fragmentation. and Salt growth
Unloading
Results in sheeting or exfoliation
Organisms
plants, animals, and microbes contribute to mechanical weathering by physically breaking down rocks.
Jointing
Fractures created by heating/cooling
Chemical weathering
Destruction of rock by chemically altering mineral composition.
(By-products are clays, silica, and rust)
Processes of chemical weathering
what processes are the following
-Hydrolysis
-Acidification
-Oxidation
Hydrolysis
dissolving minerals by Water
Acidification
dissolving minerals by acid
Carbonic Acid
acidic rainwater
Oxidation
dissolving minerals by Oxygen
