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Rocks and Weathering

Uniformitarianism The geological principle that the same processes that operate today operated in the past to change the Earth's surface
Erosion The process of wearing down and carrying away rocks.
Weathering Is the process that breaks down rocks and 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, and gravity
Frost wedging Water freezes in rocks and expands then forces rocks apart
Oxidation Iron combines with oxygen in the presents of water causing rust
permeable A material that is full of tiny connected air spaces that allows water to seep through it
soil The loose, weathered material on Earth's surface in which plants can grow
bedrock Is the solid layer of rock beneath the soil
humus Is a dark-colored substance that forms as plant and animal remains decay
fertility Is a measure of how well the soil supports plant growth
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 composition from the layers above or below it
topsoil A crumbly, dark brown soil that is a mixture of humans, clay, and other materials
subsoil Usually consist of clay and other particles of rock, but little humus
decomposer Are the organisms that break the remains of dead organisms into smaller pieces and digest them with chmeicals
natural resource Is anything in the environment that humans can use
soil conservation Is the management of soil to limit it's destruction
crop rotation a farmer plants different crops in a field all year
contour plowing farmers plow their fields along the curves of a slope instead of in straight rows
conservation plowing dead weeds and stalks of previous years crop are plowed into the ground to help return soil nurients , retain, moisture, and hold soil in place
Created by: amr200981087



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