3rd grade CRCT Practice Soil
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Created by:
shannon2323 on April 8, 2011
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11 terms
Terms | Definitions |
|---|---|
 Soil | Much of the Earths surface is covered with soil |
| Soil is made from: | Bits of weathered rocks, minerals and humus |
| Humus | is decayed remains of plants and animals |
| Sand, silt and clay are | types of soil |
| Sand | medium-sized particles / water flows through quickly |
| Silt | small-sized particles / water flows through slowly |
| Clay | very small-sized particles / water flows through VERY slowly |
| soil layers | Topsoil, subsoil and bedrock a lot of humus plants grow well here *particles dark and small |
| Topsoil | uppermost layer of soil |
| subsoil | Layer of soil just below the topsoil not much humus particles larger and lighter in color that topsoil |
| Bedrock | unweathered rock that lies below the subsoil *solid rock |
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