science chapter 7 worksheets questions
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27 terms
Terms | Definitions |
|---|---|
 roots and animals | Plant_______ and burrowing_________cause mechanical weathering. |
| surface area | Small pieces of rock have more_______ _____ than the original rock and it weather's faster. |
| Carbonic Acid | This acid formed from carbon dioxide gas and water,and plant acids can react with minerals to wheather rock |
| cold | mechanical weathering is more rapid than chemical weathering in _____ climates. |
| warm wet | Chemical weathering is more rapid than mechanical weathering in _____ , _____ climates. |
| thousands | Formation of soil can take ________ of years(Give the years in words)! |
| climate slop vegatation time of erosion rocks | List the 5 types of ways soil can erode. |
| composition | the________ of the soil is the ingredients to make up soil |
| sediments | clay, silt, and and are types of ______ |
| water or air | Small spaces between soil particles is filled with _______ or______. |
| horizons | A soil profile is made up of different_____ of soil |
| litter | may be covered with organic______ that may turn to humus |
| humus rock | Horizon A's fertile layer contains more______ and less______ |
| middle | horizon B is the ______ layer |
| humus | B horizon contains less _______ and is lighter in color than layer A |
| leaching | minerals travel from the A horizon to the B horizon in a process called ______. |
| bottom | Horizon C is the very _____ layer in a soil profile |
| Horizon C | This layer contains almost no organic matter and very little humus |
| parent | The C horizon contains a certain rock called the ________rock material |
| layers | Glaciers can deposit soil that did not form from the ______ beneath it. |
| agricultural cultivation | increased farming removes the plant cover, leaving soils open to wind and water erosion |
| forest harvesting | removes forest which increases erosion and particulary damages tropical rainforest soil |
| overgrazing | results when animals grazeuntil almost all ground cover dissapears |
| Urban Construction | clears land of vegatation and removes soil |
| no till farming | this types of farming occurs when plant stalks are left in the field |
| contour | thiis farmingreduces soil erosion by planting along the contours of slopes |
| retaining walls | steep slopes are protected by these walls |
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