| A | B |
|---|
| Leaching | The removal of minerals that have been dissolved in water |
| Mechanical Weathering | Occurs when rocks are broken apart by physical processes |
| Weathering | Surface processes that work to break down rock |
| Rock Sediments | Caused by weathering |
| Water and air, Decayed organic matter, Mineral fragments | Soil is a mixture of weathered rock and _________. |
| A | The layerof soil that contains the most humus and smaller rock and mineral particles than the other layers in the ____ horizon. |
| Oxygen | ______ is not a direct cause of mechanical weathering. |
| Carbonic acid | Over thousands of years, _____ has chemically weathered limestone, creating caves. |
