| 1-2 of 2Flashcard sets with a 'nitrogen cycle' term meaning 'bacteria in soil convert the n2 gas into solid forms to be used by living things who in turn put it back into the air.' | |||
|---|---|---|---|
| # | Title | Terms | Date |
| 1 | Layers of the Atmosphere by tappleby | 25 terms | November 14, 2008 |
| 2 | Adv. Science Vocabularyby Mattel | 52 terms | November 17, 2008 |