| A | B |
|---|
| abrasion | Weathering in which rock is worn away by the grinding action of other rock |
| litter | A layer of dead plant material, such as leaves and stems, that forms on the surface of the soil. |
| A horizon | Layer of soil where topsoil is found |
| humus | Decayed organic material in soil |
| Dust Bowl | Resulted from a drought and poor soil management in the 1930's |
| ice wedging | Caused by freezing and thawing of water |
| bedrock | Hard layer of rock beneath the soil |
| soil | Mixture of rock particles, minerals, decayed organic material, air, and water |
| hot and wet | Climate that causes rapid weathering |
| gravel | One of the largest particle found in soil |
| silt | One of the smallest particle found in soil |
| weathering of rock | How soil begins |
