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rocks

TermDefinition
uniformitarianism the principal that states the geologic processes that operate today was the same in the past
erosion the process of weathering on rocks over a peiord of time
weathering the process that breaks down other substances
mechanical weathering phyicaly broken down into smaller pieces
chemical weathering the process that breaks down rock throught chemical changes
abrasion wearing away of rock by rock particles through water ice wind and gravity
frost wedging when water seeps into cracks and then freezes and expands
oxidation iron combines with water
permeable full of tiny connected air spaces that allow water to seep in the rock
soil loose weathered material on earth's surface
bedrock solid layer of rock beneth the soil
humus dark colored substance thatforms as plants and animals remains decay
fertility measure of how well the plants soil supports the plants
loam soil that is made up of clay sand and silt
pH scale measures acidity
soil horizon a layer of soil that differs in color texture and composition
top siol crumby dark brown soil
subsoil consists of clay little humus
decomposers organisms that break down the dead organisms and return the nutrients back to the soil
natural resource anything in the envirment that humans can use
soil conservation management of soil to limit its destruction
crop rotation different crops in a field each year
contour plowing plows in the curves of the hill or slope instead of plowing straight lines
conservation plowing dead leaves are plowed for next years crop
Created by: cJS11423
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