| A | B |
|---|
| solar energy | A renewable resource that is the energy of the sun |
| recycling | Finding uses for things instead of throwing them away |
| petroleum | the non-renewable resource with the common name, oil |
| ore | Mineral rich rock, removed from the earth & used to make products |
| humus | part of soil made up of decayed plant & animal matter |
| conservation | the efficient use of resources |
| fossil fuels | made from the remains of organisms that lived long ago |
| petroleum is a non-renewable resource | because it is used faster than it can be replaced |
| subsoil | a layer of soil made mostly of small rocks |
| by converting solar energy to electricity | How solar cells support the need for energy |
| A true recycling fact | Paper is easier to recycle than other materials. |
| Conservation of resources | effiiciently using only what you need |
| Wind turbines | capture wind energy |
| The energy in coal | can be traced to the sun |
| A result of using non-renewable resources | Released carbon dioxide may lead to global warming. |
| True of soil | Soil covers most of Earth's land surface |
| A natural resource | water |
| because it won't run out | Solar energy is a renewable resource |
| Order of soil layers from top to bottom | topsoil, subsoil, bedrock |
| because water runs through sandy. | Sandy soil is not the best planting soil |
| Living things that support life on earth | animals, plants, fungi |
| Non-living things that support life on Earth | sunlight, water, soil, minerals |
| How solar energy works in nature | Sunlight warms Earth, air that touches warm ground is heated & cooled air creates wind energy. |
| More of how solar energy works in nature | The sun causes water to evaporate powering the water cycle. |
