| A | B |
|---|
| Biogeochemical Cycles | Water, carbon, nitrogen, phosphorus |
| Common type of denitrifying bacteria | Micrococcus |
| Common type of nitrifying bacteria | Nitrobacter |
| Common type of nitrogen-fixing bacteria found in legumes | Rhizobium |
| Common types of nitrogen-fixing bacteria found in soil and water | Azotobacter and Clostridium |
| 78% of air is composed of this | N2 Gas |
| Anaerobic | Without Oxygen |
| Essential to living organisms (DNA/RNA, cell membranes, ATP) | Phosphorus |
| Nitrogen Fixation | Process by which bacteria convert N2 into nitrate |
| Nitrification | Process by which bacteria convert NH3 into nitrate |
| Assimilation | Uptake of nitrate by autotrophs to make amino acids |
| Denitrification | Process by which nitrate is converted by bacteria into N2 |
| Ammonia | NH3 |
| Nitrate | NO3 |
| Nitrite | NO2 |
| Atmospheric Nitrogen | N2 |
| Carbon is found in this form in the atmosphere | CO2 |
| Carbon is found in this form in the ocean | Dissolved CO2 and CaCO3 |
| Necessary for living things to make proteins | Nitrogen |
| Legumes | Plants such as alfalfa, beans, peas, soybeans, and clover |
