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10 Cards in this Set
- Front
- Back
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a material that forms the essential part of the earth's solid crust
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rock
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an inorganic material derived from rocks, or a distinct mineral found in nature
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mineral
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chemically unaltered mineral since deposition and crystalizatoin from molten lava
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primary mineral (ie: quartz, muscovite, feldspar)
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results from the decomposition of a primary mineral
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secondary mineral (ie: calcite, gymsum, clay minerals)
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all physical and biochemical changes produced in rocks at earth's surface by stmospheric agents
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weathering
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physical weathering (4)
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Temp: expansion and contraction due to heat
Abrasion by water, ice, and wind Plants and animals: break and move Dominant in very cold or dry environments. |
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Biochemical weathering (4)
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Hydration: addition of H2O
Dominant in hot and wet conditions Hydrolysis Dissolution: water disolving substances Carbonation and acid reactions |
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Hydrolsis
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water molecules split into H+ and OH-, and H+ replaces a cation from the mineral
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5 Factors influencing soil formation
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1.parent material:lithosequence
2.Cimate:biosequence 3.Biota:biosequence 4.Topography:topsequence 5.Time (chronosequence) -Soil is a dynamicnatural body having properties derived from the combined effects of climate biotic activities, as modified by topog, impacted by par mater over periods of time |
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4 Basic proceses of soil formation
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1.Transfomations: phys, or chem modified
2.Translocation:mov't of org and inorg material(salt moving up) 3.Additions:inputs from outside sources(dust deposit) 4.Losses:(cation leaching, clay mov't) |
