| 1-2 of 2Flashcard sets with a 'nitrogen cycle' term meaning 'the movement of nitrogen from the nonliving environment into living things and then back into the nonliving environment' | |||
|---|---|---|---|
| # | Title | Terms | Date |
| 1 | Spheres & Cyclesby sparnell | 11 terms | September 30, 2008 |
| 2 | Biogeochemical Cyclesby sparnell | 16 terms | March 7, 2008 |