| A | B |
|---|
| The Nitrogen cycle starts here. | Atmospheric Nitrogen (N2) |
| Atmospheric Nitrogen (N2) is taken up by | Nitrogen-fixing bacteria |
| Nitrogen-fixing bacteria convert atmospheric nitrogen (N2) into | Ammonia ions (NH4) |
| Ammonia is absorbed by | legume plants |
| Legume plants convert ammonia into | Nitrate ions (NO3) |
| Nitrate ions (NO3) in legume plants are consumed by | animals |
| Animals use nitrates (NO3) to make | amino acids/proteins |
| Extra nitrates not used by animals for from fertilizers are | released into the soil |
| Dead plants, animals, and extra nitrates in the soil go to | decomposers (bacteria & fungi) |
| Decomposers convert dead matter into | atmospheric Nitrogen (N2) |
