| Result: |
| Right: 0 | Wrong: 0 |
| The circulation of elements or molecules through the atmosphere & biosphere. |  |
|
Nutrient (or biogeochemical) cycles
|
| Result: |
| Right: 0 | Wrong: 0 |
| The circulation of elements or molecules through the atmosphere & biosphere. | |
|
Nutrient (or biogeochemical) cycles
|