| A | B |
|---|
| Rich fertile soil that is made up of equal parts clay sand and silt | loam |
| characteristics of a material full of tiny connected airspaces that water can seep through | permeable |
| anything in the environment that humans use | natural resource |
| mixture of hummus clay and other minerals that forms the crumbly top most layer of soil | topsoil |
| the management of soil to prevent its destruction | soil conservation |
| a natural inorganic solid with a crystal structure and a definite chemical composition | mineral |
| the planting of different crops in a field each year to maintain the soil's fertility | crop rotation |
| type of rock that forms when particles from other rocks or plants are pressed and cemented together | sedimentary rock |
| the process by which water ice or wind or gravity moves weatherd rock or soil | erosion |
| dark colored organic matter in soil | humus |
| process that spits rock when water seeps into cracks then freezes and expands | ice wedging |
| a type of rock that forms from the cooling of moten rock at or below the surface | igneous rock |
| the geologic principle that the same geologic process that operate today operated in the past to change earth's surface | uniformitarianism |
| rock that contains metal or a useful mineral | ore |
| a loose layer of dead plant leaves and stems on surface of soil | litter |
| the solid rock beneath the soil | bedrock |
| conservation method in which the dead stocks from the previous years crop are left in the ground to hold the soil in place | conservation plowing |
| type of weathering in which rock is physically broken into smaller pieces | mechanical weathering |
| plowing fields along the curves of a slope to prevent soil loss | contour plowing |
| small solid pieces of material from rocks or organisms earth material depositied by erosion | sediment |
| a natural resource that is not placed in a useful time frame | nonrenewable resource |
| the grinding away of rock by other rock particles carried in water ice or wind | abrasion |
| rocks that form when a rock is changed by heat and pressure or chemical reactions | metamorphic rock |
| the layer of soil that differs in color and texture from the layers above or below it | soil horizon |
| the loose weathered material on earth's surface in which plants can grow | soil |
