| A | B |
|---|
| using only what you need efficiently | conservation |
| save, collect, or use materials again | recycling |
| petroleum, oil, coal, gas | nonrenewable energy |
| coal, natural gas, and oil | fossil fuels |
| part of soil made up of rotting plants and animals | humus |
| mineral-rich rock deposit | ore |
| converts Sun's energy into electricity | solar cells |
| made mostly of small rock | subsoil |
| captures wind energy | wind mill |
| using nonrenewable resources may cause this | global warming |
| coal's energy comes from | stored energy that the plants didn't use from the sun |
| paper comes from | wood |
| living natural resources | fungi, plants, animals |
| supplies that nature provides | natural resources |
| nonliving natural resources | water, soil, minerals, sunlight |
| everything we eat, use, or buy comes from or is a | natural resource |
| soil that holds water but is hard for roots to spread | clay |
| can't hold water | sand |
| made into T-shirts, quilted jackets, sleeping bags | recycled plastic |
| other sources of energy | solar, wind, water |
