| A | B |
|---|
| source | where you find a nutrient |
| sink | where large stores of a nutrient are found |
| carbon | needed to live, organisms are built out of this |
| nitrogen | nutrient needed for creating proteins, and necessary for plant growth |
| limiting nutrient | when a nutrient is not available, and it's absence limits plant growth |
| cycle | repeating series of events |
| nitrogen fixing bacteria | pull nitrogen out of the atmosphere and make it useful for plants |
| denitrification | when nitrogen is no longer useful for organisms |
| atmosphere | sphere that contains the most nitrogen |
| hydrosphere | sphere that contains the most carbon |
| photosynthesis | how carbon dioxide is changed into carbon based sugars and oxygen |
| cellular respiration | how carbon based sugars and oxygen are changed into CO2 |
