| A | B |
| Predator-Prey | hunts, takes down, kills and consumes another |
| Mutualism | both organisms benefit |
| Commensalism | one organism benefits the other is unaffected/doesn't care |
| Parasitism | one organism benefits the other is harmed |
| Primary Succession | bare rock - builds soil |
| Niche | Includes role of an organism in a ecosystem |
| Habitat | where an organism lives |
| Secondary Succession | soil is intact - plants move in quickly |
| Phosphorous Cycle | weathering of rocks releases this element needed for cells |
| Nitrogen-fixing bacteria | Prokaryote that converts a gas to a solid/liquid |
| Water Cycle | Includes transpiration |
| Carbon Cycle | being artificially altered through the combustion of fossil fuels |
| Oxygen Cycle | provides an essential element FOR cellular respiration |
| Nitrogen Cycle | 78% of our atmosphere and is used to build cellular tissue |