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Ch 2

TermDefinition
uniformitarianism The geologic principle that the same geologic process that operate today operated in the past to change Earth's surface
erosion The process by which water, ice, wind or gravity moves and chippes away the ground
weathering The chemical and physical process that breaks down rock and other substances
mechanical weathering The type of which rock is physiclay Broken into smaller peices
chemical weathering The process theta breaks down rock through chemical changes
abrasion The grinding away of rock by other particals carried in ice water and wind
frost wedging The process that splits rock when whater seeps into cracks and turned into ice
pemeable Charictaristic of a material that contains connected air spaces or pores that water can seep through easily
soil The loose weathered material o Earth's surface that allowed plants to grow
bedrock Rock that makes up Earth's crust
humus Dark colored organic material in soil
fertility A measure on how well soil supports plant growth
loam Rich fertile soil that is made of equal parts clay sand and silt
PH scale A range of values used to indicate how acidic or basic a substance is
soil horizion A layer of soil that differs in color and texture from the layers above or below it
topsoil The crumbley top of soil made up of clay and other materials
subsoil The layer of soil below topsoil made up of clay and other materials
decomposer An organism that gets energy by breaking down wastes and dead organisms
natural recource Anything occuring in the envionment that humans can use
soil coservation The management of soil to limits its destructsion
crop rotation The planting of different crops in a feild each year to maintain the soils fertility
contour plowing Plowing fields along the curves of a slope to prevent soil loss
conservation plowing Soil conservation method in which weeds and dead stalks from the previous year are plowed into the ground.
Created by: alefer003
 

 



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