| A | B |
|---|
| atmosphere | system of air layers |
| geosphere | system of rock layers |
| cryosphere | system of ice |
| hydrosphere | system of water |
| biosphere | system of life |
| freshwater | water nearly free of salt |
| groundwater | water stored in cracks and pores |
| mineral | has a crystalline structure |
| rock | made up of minerals and soil |
| troposphere | weather is here |
| stratosphere | ozone layer is here |
| mesosphere | meteoroids burn up here |
| thermosphere | layer divided into two parts |
| ionosphere | electricity in this layer |
| exosphere | satellites in this layer |
| density | how thick or thin something is |
| satellite | object that travels around another |
| temperature | used to signal layer change |
| streak | used to check a mineral |
| inorganic | not living and never had life |
