| A | B |
|---|
| a rock formation that is the source of soil | parent rock |
| layer of rock beneath the soil | bedrock |
| the soil qualities that are based on the proportions of soil particles | soil texture |
| arrangement of soil particles | soil structure |
| the dark, organic material formed in soil decayed remains of plants and animals | humus |
| the removal of substances that can be dissolved from rock, ore, or layers of soil due to passing of water | leaching |
| a loose mixture of small mineral fragments, organic material, water, and air that can support the growth of vegetation | soil |
| the process by which wind, water, ice, or gravity transport soil and sediments from one location to another | erosion |
| the preservation of soil against deterioration or erosion | soil conservation |
