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Earths System Test
| Question | Answer |
|---|---|
| What do you call sets of layers of gas surrounding Earth or another planet? | Atmosphere |
| What do you call the solid portion of Earth, including the crust and upper mantle of Earth? | Geosphere |
| What do you call the part of Earths crust, water, and atmosphere that supports life? | Biosphere |
| What do you call all the waters on Earths surface, such as lakes and seas? | Hydrosphere |
| How much water on Earth is salt water? | 97% |
| How much water on Earth is fresh fresh water? | Less than 3% |