| A | B |
|---|
| weathering | surface processes that work to break down rock |
| Mechanical Weathering | occurs when rocks are broken apart by physical processes |
| Ice Wedging | occurs in temperate and cold climates where water enters cracks in rocks and freezes |
| chemical weathering | occurs when chemical reactions dissolve the minerals in rocks or changes them into different minerals |
| Oxidation | occurs when some materials are exposed to oxygen and water |
| climate | the pattern of weather that occurs in a particular area over many years |
| soil | mixture of weathered rock, decayed organic matter, mineral fragments, water and air |
| humus | decayed organic materials |
| horizons | different layers of soil |
| soil pofile | all three of the soil horizons make up the |
| litter | leaves, twigs, and other organic material |
| leaching | the removal of minerals that have been dissolved in water |
| no-till farming | plant stalks are left in the field after harvesting and the next year's crop is planted within the stalks without plowing |
| contour farming | planting along the natural contours of the land to reduce soil erosion |
| terracing | farming method used to reduce erosion on steep slopes. looks like steps |
