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4E Science-Soil
| Question | Answer |
|---|---|
| Movement of rock pieces to new places | erosion |
| Cutting wide, flat planting areas into the sides of steep hills or mountains | terracing |
| Farmers control soil loss by ____ around hills instead of up and down the hills. | contour plowing |
| Planting crops between rows of other crops to help hold soil in place | strip cropping |
| Rotting plant and animal materials that are a part of topsoil | humus |
| The process of rocks being broken up by growing plants roots | weathering |
| Soil is made up of these two things | weathered rock and humus |
| Three layers of soil | topsoil, subsoil, and bedrock |
| Clay doesn't absorb much water, so plants in clay soil need a lot of _____. | water |
| Soil that is poor for growing plants can be improved by adding _____. | fertilizer |
| The best soil for growing most plants contains a __________. | mixture of ingredients |
| Soil is a necessary resource because _____. | plants grow in it |
| Topsoil can be carried away by runoff when there is more _____ than the soil can hold. | rain |
| Why is growing the same crop year after year harmful for the soil? | It can use up certain nutrients in the soil. |
| One way farmers conserve soil is by _____, which helps prevent wind erosion. | strip cropping |
Created by:
MrsHeatherKing
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