1	weathering		_____	is the process that breaks down rock through chemical changes
2	erosion		_____	a layer of soil that differs in color and texture form the layers above or below it.
3	uniforitarianism		_____	organisms that break down the remains of dead organisms
4	mechanical weathering		_____	farmers plow their fields along curves of a slope
5	abrasion		_____	Rock is phyically broken into smaller pieces
6	ice wedging		_____	the measure of how well the soil supports plant growth.
7	chemical weathering		_____	the process that breaks down rock and other substances at Earth's surface
8	oxidation		_____	the process of ice wedging in rocks that deepen and widen cracks.
9	permeable		_____	ruined farmland in western Oklahoma
10	soil		_____	grinding away of rock particles carried by water, ice, wind and gravity
11	Humus		_____	sol that usually consists of clay and other particles.
12	fertility		_____	Form in dry areas where few plants and little chemical weathering occur
13	loam		_____	formed by a loose layer of leaves that have been shedded.
14	soil horizon		_____	a crumbly dark brown soil that is a mixture of humus, clay, and other minerals.
15	topsoil		_____	Iron combines with oxygen to form rust
16	subsoil		_____	farmers disturb the soil and its plant cover as little as possible
17	litter		_____	Forms where it is cold year round
18	Decomposers		_____	the thick mass of though roots at the surface of soil
19	sod		_____	soil that is made up of equal parts of clay, sand and silt.
20	natural resource		_____	often low in humus and minerals
21	Dust Bowl		_____	is the management of soil to prevent its destruction
22	Soil Conservation		_____	Forms in warm, wet climates and maybe low in humus
23	contour plowing		_____	dark colored substance that forms as plant and animal remains decay
24	conservation plowing		_____	range from thick and fertile to thin with little humus
25	crop rotation		_____	a mixture of rock particles, minerals, decayed organic materials, water and air
26	Prairie soils		_____	a farmer plants different crops in a field each year
27	Northern Forest Soils		_____	same processes that operate today operated in the past
28	Mountian Soils		_____	the removal of rock particles by wind, water,
29	Tundra Soils		_____	means that material is full of tiny, connected air spaces that allow water to seep through it.
30	Tropical soils		_____	is anything in the envirnoment that humans use
31	Southern Forest Soils		_____	top soil thick and rich in humus
32	Desert Soils		_____	Top soil often thin because temperatures slow chemical weathering
33	Monogahela Silt Loam		_____	West Virginia state Soil