Rocks and Weathering
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| uniformitarianism | The geologic principle that the same geologic processes that operate today operated in the past to change the Earth's surface
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| erosion | The process by which water, ice, wind or gravity moves weathered particles of rock and soil.
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| weathering | The chemical and physical processes that break down rock and other substances
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| mechanical weathering | The type of weathering in which rock is physically broken into smaller pieces
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| chemical weathering | The process that breaks down rock through chemical changes.
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| abrasion | The grinding away of rock by other rock particles carried in water, ice, or wind.
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| frost wedging | Process that splits rock when water seeps into cracks, then freezes and expands.
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| oxidation | A chemical with oxygen, as when iron oxidizes, forming rust
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| permeable | Characteristics of a material that contains connected air spaces, or pores, that water can seep through easily
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| soil | The loose, weathered material on Earth's surface in which plants can grow.
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| bedrock | Rock that makes up Earth's crust; also the solid rock layer beneath the soil.
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| humus | Dark-colored organic material in soil
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| fertility | A measure of how well soil supports plant growth
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| loam | Rich, fertile soil that is made up of about equal parts of clay, sound, and silt
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| pH scale | A range of values used to indicate how acidic or basic a substance is; expresses the concentration of hydrogen ions in a solution
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| soil horizon | A layer of soil that differs in color and texture from the layers above or below it
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| topsoil | The crumbly, topmost layer of soil made up of clay and other minerals and humus (nutrients and decaying plant and animal matter).
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| subsoil | The layer of soil below topsoil that has less plant and animal matter than topsoil and contains mostly clay and other minerals
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| decomposer | An organism that gets energy by breaking down wastes and dead organisms, and returns raw materials to the soil and water
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| natural resource | Anything naturally occurring in the environment that humans use
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| soil conservation | The management of soil that differs in color and texture from the layers above or below it
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| crop rotation | The planting of different crops in a field each year to maintain the soil's fertility
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| contour plowing | Plowing fields along the curves of a slope to prevent soil loss.
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| conservation plowing | Soil conservation method in which weeds and dead stalks from the previous year's crop are plowed into the ground
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
lcaluag