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Earth's Surface

Definitions

TermDefinition
Uniformitarianism The principle that states that the geological processes that operate today also operated in the past
Erosion The process of wearing down and carrying away rocks
Weathering The process that breaks down rocks and other substances.
Mechanical Weathering The type of weathering in which rock is physically broken down into smaller pieces
Chemical Weathering The process that breaks down rock through chemical changes
Abrasion The wearing away of rock by rock particles carried by water, ice, wind. or gravity
Frost Wedging When water seeps into cracks and them freezes causes the crack to widen
Oxidation When iron combines with oxygen in the presence of water
Permeable When the material is full of tiny connected air spaces that allow water to seep through it.
Soil The loose weathered material on Earth's surface
Bedrock The solid layer of rock beneath the soil
Humus The dark colored substance that forms as a plant and animals remain decay
Fertility The measure of how well the soil supports plant growth
Loam Soil that is made of of equal parts clay,sand, and silt
pH Scale The scale that measures acidity
Soil Horizon A layer of soil that differs in color
Topsoil A crumbly dark brown soil that is made up of a mixture of hummus, clay and other materials
Subsoil Soil that mainly consists of Clay and Rock
Decomposer Decomposers are the organisms that eat dead bodies
Natural Resource Anything in the environments humans can use
Soil Conservation The management of soil to prevent destruction
Crop Rotation When a farmer plants differents crops in a field each year
Contour Plowing When farmers plow their fields along the curves of a slope instead of in straight rows
Conservation Plowing Dead weeds and stalks of the previous year's harvest
Created by: tdr201087261
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