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rocks and weathering

QuestionAnswer
weathering is the process that breaks down rocks or other substances
Mechanical weathering A type of weathering where rock is physically broken
Chemical weathering is the process that breaks down rock through chemical changes
Abrasion wearing away rock by rock particles carried by water ice wind or gravity
uniformitarianism the geological principle that the same processes that operate today operated in the past to change the earths surface
Erosion the process of wearing down and carrying away rocks
frost wedging water that freezes rocks and expands then forces the rocks apart
oxidation iron combines with oxygen in the presence of water causing rust
periable little spaces in rocks that allows water to get into
soil the loose weathered material on the earths surface in which plants grow
bedrock is the solid layer of rock beneath the soil
humus is a dark colored substance that forms as a plant and and animal remains decay
fertility the fertility of soil is a measure of well the soil supports plant growth
loam loam is the best soil for growing most plants
pH scale measures acidity
soil horizon is a layer of soil that differs in color ,texture and compositions for layer above of below it
topsoil a crumbly dark brown soil that is a mixture of humus clay and other materials
subsoil usually consists of clay and other particles of rock but little humus
decomposer are the organisms that break the minerals of dead organisms into smaller pieces and digest them with chemicals
natural resource is anything in the environment that humans use
soil conservation is the management of soil to limit its use
crop rotation a farmer uses different crops in a field each year
contour plowing farmers plow their fields on curves of a slope instead of straight rows
conservation plowing dead weeds and stalks from the previous years crop are plowed into the ground to help return soil nutrients
Created by: kcj10955
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