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Science Set #4
Science Set #4 - Soil
| Question | Answer |
|---|---|
| soil | loose, weathered material on Earth’s surface in which plants can grow |
| bedrock | the solid layer of rock beneath the soil |
| humus | a dark-colored substance that forms as plant and animal remains decay |
| soil fertility | a measure of how well the soil supports plant growth |
| loam | soil that is made up of about equal parts of clay, sand, and silt |
| soil horizon | a layer of soil that differs in color and texture from the layers above or below it |
| topsoil | a crumbly, dark brown soil that is a mixture of humus, clay, and other minerals |
| subsoil | the B horizon, usually consists of clay and other particles washed down from A horizon, but little humus |
| litter | the loose layer of dead plant leaves and stems on the surface of the soil |
| decomposers | the organisms that break the remains of dead organisms into smaller pieces and digest them with chemicals |
Created by:
rllower1
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