Science Ch. 9 Weathering and Erosion
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Created by:
wendibthrelkeld on February 3, 2011
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21 terms
Terms | Definitions |
|---|---|
 Soil | Loose material lat the surface of the earth. |
| Most soil is made of... | Bits of weathered rock. |
| Humus | decayed plant and animal material. |
| Humus helps plants by providing... | Nutrients for them to grow. |
| Name three sizes of soil. | Sand, silt, clay. |
| What are the three layers of soil? | Topsoil, subsoil, bedrock. |
| Does the soil in each layer look different or about the same? | Different. |
| Are the layers about the same or different thickness? | Different. |
| Causes the dark color in soil... | Humus |
| Subsoil | Coarse, weathered rock that doesn't contain humus. |
| Erosion | movement of weathered material from one location to another. |
| Delta | An area of sediment at the mouth of a river. |
| Glacier | A huge river of ice. |
| Deposition | when wind, water, or ice drop weathered material in a new location. |
| Sudden downhill movement of soil and rocks. | Landslide |
| Sudden downhill movement of snow and ice. | Avalanche |
| Sediment | Small bits of weathered rock and other materials. |
| Water erosion | can cause canyons and glaciers. |
| Glaciers can cause... | hills called moraines. |
| Wind erosion can cause... | hills called dunes. |
| Gravity | This is why water flows downhill. |
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