A | B |
natural resource | something found in nature that is used |
raw material | resource that is changed before it is used |
recyclable resource | is used over and over without destroying |
renewable resource | is destroyed but can be replaced |
nonrenewable resource | cannot be replaced once used |
parent material | rock from which nature makes soil |
mechanical weathering | nature physically breaks up rock |
chemical weathering | dissolves rock material |
humus | decayed pland and animal material that makes soil fertile |
leaching | excesive rainfall drains soil of its nutrients |
biotic resources | resources from living things |
fossil fuels | oil, coal, natural gas |
salt | nonmetallic mineral important to human health |
adaptation | how plants and animals adjust to their environment |
types of coal | peat, lignite, bituminous, anthracite |
TVA | Tennessee Valley Authority - produces energy for large parts of the south |
strip mining | removes topsoil to get at coal near surface |
alternative energy resources | wind, water, solar, geothermal, tides, etc. |
ore | rock which contains metal |
fresh water | only makes up about 3% of total water supply |