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E.S. Ch.13 vocab

Chapter 13 Vocabulary Practice Terms

chemical weathering process that involve the chemical alteration of rock in such a manner that it is more likely to fragment or to be dissolved
contour farming a method of tilling and planting at right angles to the slope, which reduces soil erosion by runoff
crust the outer, solid surface of the earth
erosion the processes that losen and move particles from one place to another
friability the ability of a soil to crumble
horizon a horizontal layer in the soil. the top layer (A horizon) has organic material. the lowyer layer (B horizon) receives nutrients by leaching. the C horizon is partially weathered parent material
humus soil organic material
land the surface of the earth not covered by water
leaching the movement of minerals from the A horizon to the B horizon by the downward movement of soil water
loam a soil type with good drainage and good texture that is ideal for growing crops
mantle the layer of the earth between the crust and the core
mechanical weathering physical forces that reduce the size of rock particles without changing the chemical nature of the rock
parent material material that is weathered to become the mineral part of the soil
plate tectonics the concept that the outer surface of the earth consits of large plates that are slowly moving over the surface of a plastic layer
soil a mixture of mineral material, organic matter, air, water, and living organisms; capable of supproting plant growth
soil profile the series of layers (horizons) seen as one digs into the soil
soil structure refers to the way that soil particles clump together. sand has little structure because the particles do not stick one to another
soil texture refers to the size of the particles that make up the soil. sandly soil has large particles, and clay has small particles
strip farming the planting of crops in strips that alternate with other crops. the primary purpose is to reduce erosion
terrace a level area constructed on steep slopes to allow agriculture without extensive erosion
waterways low areas that water normally flows through
weathering the physical and chemical breakdown of materials; involved in the breakdown of parent material in the soil formation
windbreak the planting of trees or strips or grasses at right angles to the prevailing wing to reduce erosion of soil by wind
Created by: rburrier