| Term | Definition |
|---|
| nonrenewable resource | a material used by humans that cannot be replaced |
| soil profile | a cross section of the different layers in soil |
| conservation | the preserving and wise use of natural resources |
| natural resource | a material found in earth that can be used by humans |
| biodegradable | a material that can be broken down easily in the environment |
| topsoil | the layer of soil that is rich in minerals and humus |
| pollutant | a substance that causes pollution |
| renewable | a material that replaces itself or can be replaced |
| fossil fuel | an energy source formed from the remains of once-living things |
| humus | decayed plant and animal matter in healthy soil |
| evaporation | the process in which liquid water changes into a gas |
| condensation | the process in which water vapor changes into water and falls to earth as precipitation |
| loam | the best type of soil for growing plants |
Combine with other sets
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