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Soil
| Term | Definition |
|---|---|
| biota | all the organisms living in a region |
| climate | average weather of an area |
| decomposition | process that changes once-living material into organic matter |
| horizon | layer of soil formed from the movement of the products of weathering |
| organic matter | remains of something that was once alive |
| parent material | starting material—rock or sediment—that weathers and forms soil |
| pore | small hole or space in soil |
| sediment | rock material that has been broken down or dissolved in water |
| soil | mixture of weathered rock, rock fragments, decayed organic matter, water, and air |
| topography | shape and steepness of the landscape |