Chapter 1
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| Uniformitarianism | The geological principle that the same processes that operate in the past operate today.
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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 at rock by other rock particles carried away at water, ice, or wind.
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| Frost wedging | process that splits rock when water seeps into crack then freezes and expands it
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| Oxidation | A chemical change in which substances combine with oxygen, as when iron oxidizes, forming rust.
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| Perimalble | Characteristics of a material that contains connected connected air spaces, or pores, that water con seep through easily.
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| Soil | The loose weathered material on earths surface in which plants can grow,
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| Bedrock | Rock that makes up earths crust; also the solid rock 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 plants growth.
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| Loam | Rich fertilized soil that is made up of about equal parts of clay, sand, and silt.
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| pH scale | A range of values used to indicate how acidic or basic a substance is;express the concentration of hydrogen ions in a solution.
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| Soil horizon | A layer of soil that differs in color and textures from layers above or below it.
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| Topsoil | The crumbly topmost layer of soil made up of clay and other materials and humus. (nutrients and decaying plant and other animal mater)
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| Sub soil | The layer of soil below the top soil that has less plant and animal matter than topsoil and contains mostly clay and other minerials
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| Decomposer | An organism that gets energy by breaking down waste and dead organism and returns raw materials to the soil and water.
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| Natural Resources | Anything natural occurring in the environment that humans use.
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| Soil conservation | The management of soil to limit its destruction.
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| Crop Rotation | The planting of different crops in a field each year to maintain the soil fertility
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| Contour Plowing | Plowing fields along the curves of a slope to prevent soil lose.
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| Conservation Plowing | Soil conservation method in which weeds and dead stalks from the previous years crop are plowed into the ground .
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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.
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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