| Term | Definition |
|---|
| Horizon O | organic material 2"- 4" |
| Horizon A | Humis mixed with minerals 4"- 10" |
| Horizon B | Silicates, Aluminum 10"- 18" |
| Horizon C | Unchanged Material, calcium, Magnesium 18"- 36" |
| Horizon R | rock 36" + |
| Primary Succesion | succesion that occurs on land where no soil exists |
| Secondary Succesion | sequence of changes that take place after a community is disruptied by a natural disasters of human actions |
| Oligotrophic Lake | A nutrient-poor, clear, deep lake with minimum phytoplankton. |
| Mesotrophic Lake | Lake with a moderate supply of plant nutrients. |
| Eutrophic Lake | A highly productive lake, having a high rate of biological productivity supported by a high rate of nutrient cycling. |
| Scientific Method | A research method whereby a problem is identified, a hypothesis stated, and hypothesis is tested |
| Ammonium | Nitrogen Cycle 1 |
| Nitrites | Nitrogen Cycle2 |
| Nitrates | Nitrogen Cycle3 |
| Plants | Nitrogen Cycle4 |
| Animals | Nitrogen Cycle5 |
| Decomposers | Nitrogen Cycle6 |
Combine with other sets
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