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Science chapter 2

Interactive Science Book 3

Eroision The process of wearing down and carrying rocks.
Weathering The process that breaks down rock and other substances.
Mechanical Weathering The type of weathering in which rock is physically broken into smaller pieces.
Chemical Weathering The process that breaks down rock through chemical changes.
Abraison Refers to the wearing away of rock by rock particles carried by water, ice, wind, or gravity.
Frost Wedging Wedges of ice in rocks widen and deepen the cracks.
Permiable It means that a material is full of tiny, connected air spaces that allow water to seep through it.
Soil The loose, weathered material on earths surface in which plants can grow
Bedrock The solid layer of rock beneath the soil.
Humus A dark colored substance that forms as plant and animal remains decay.
Fertitity Soil that is rich in humus.
Loam Soil that is made up of about equal parts of clay, sand, and silt.
pH Scale Measures acidity.
Soil Horizon A layer of soil that differs in color, textures and composition from the layers above or below.
Topsoil A horizon.
Subsoil B horizon.
Decomposers The organisms that break the remains of dead organisms into smaller pieces and digest them with chemicals.
Natural Resources Anything in the environment that humans can use.
Soil Conservation The management of soil to limit its destruction.
Crop Rotation A farmer that plants different crops each year.
Contour plowing Farmers that plow their fields along the curves of a slope instead of in straight rows.
Conservation lowing A method in which the dead stalks from the previous year's crop are left in the ground to hold the soil in place.
Uniformitarianism The theory that changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes.
Created by: mwels11341