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soil 3.7
soil
| Question | Answer |
|---|---|
| components of soil | rock, clay, sand, silt, and humus |
| 3 layers of soil | topsoil, subsoil, and bedrock |
| What is topsoil? | the upper part of soil. good for growing plants |
| How is soil formed? | by a process called weathering |
| What is weathering? | the breaking down of rock into smaller pieces by water,wind, and plants |
| What is subsoil and bed rock? | layers of soil under the topsoil. not good for growing plants |
| top soil is made by______. | the breaking down of subsoil and bedrock |
| Humus is _. | decayed matter in the topsoil. It adds nutrients to the soil. |
| Clay | contains tiny particles of soil that holds water well and has some nutrients |
| Sand | is made up of small grains of worn-down rock, has few nutrients, and does not hold water well or |
| Silt | is made up of very small broken pieces of rock. It is small than sand and larger than clay. |
| Conserve means to ___. | use wisely |
| Why should we conserve soil? | It takes thousands of years to form. |
| How do we protect soil? | We plant plants, so the roots will hold the soil in place. |
| Why do we need soil? | It gives us nutrients that plants need to grow. |
Created by:
cparks3
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