Weathering
Soil Formation and Composition.
Dust Bowl
Soil horizons
Soil conservation.
100
What is the type of weathering in which rock in physically broken into smaller pieces?
What is mechanical weathering.
100
What is the solid layer underneath the soil horizons?
What is bedrock.
100
The area of the Great Plains where wind erosion caused soil loss during the 1930's.
What is the Dust Bowl.
100
It is made up of topsoil, a crumbly, dark brown soil that is a mixture of humus, clay, and other minerals.
What is the A horizon.
100
2 methods in which soil can be conserved.
What is contour plowing and conservation plowing.
200
What is the process that breaks down rock through chemical changes?
What is chemical weathering.
200
What is the dark-colored organic material in soil?
What is humus.
200
When The Dust Bowl started.
What is the 1930's.
200
Consists of partly weather rock.
What is the C horizon.
200
The practice of plowing fields along the curves of a slope.
What is contour plowing.
300
What is the characteristic of a material that is full of tiny, connected air spaces that water can seep through.
What is permeable?
300
What is a thick mass of grass roots and soil?
What is sod.
300
The drought and soil loss lasted up until this moment.
What is 1938.
300
Mixture of rock particles, minerals, decayed organic materials, air, and water.
What is soil.
300
This process disturbs the soil and its plants as little as possible.
What is conversation plowing.
400
What are the chemical and physical processes that break down rock at Earth's surface?
What is weathering.
400
What is a soil organism that breaks down the remains of organisms and digests them?
What is a decomposer.
400
When the farmers came to the Great Plains.
What is the 1800's.
400
The loose layer of dead plant leaves and stems on the surface of the soil.
What is litter.
500
What is the grinding away of rock by other rock particles carried in water, ice, or wind?
What is abrasion.
500
What is rich, fertile soil that is made up of about equal parts of clay, sand, and silt?
What is loam.
500
This action removed the grass from the Great Plains exposing the soil which results in creating dust.
What is plowing.
500
Contains little humus and mostly washed down particles from A.
What is the B horizon.
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