| A | B |
|---|
| renewable resource | a resource that is made over and over again |
| biosphere | an earth system that includes all living things |
| geosphere | earth's system that includes rocks soil and sediments |
| lithosphere | a part of geosphere that has a crust |
| hydrosphere | an earth system that includes all water |
| atmosphere | the layer of mixed gases that surround earth |
| crust | the part of the lithosphere that is hard |
| fossil fuels | a natural substance formed from the buried remains of ancient organisms that can be used as a source of energy |
