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Nitrogen&Phosporus
overview of nitrogen & phosphorus cycle
| Question | Answer |
|---|---|
| process by which nitrogen is returned to the atmosphere from the soil by bacteria | denitrifiation |
| rock cycle or sedimentary biogeochemical cycle | phosphorus |
| breakdown organic matter to release nitrogen or other elements for use by plants & animals | decomposers |
| found in teeth and bones of animals and in ocean sediments & rocks | phosphorus |
| where nitrogen fixing bacteria are found | in the root nodules of legumes |
| What does the atomic number represent? | the number of protons |
| process by which bacteria take nitrogen from the air and convert it into a form useable by plants | nitrogen fixation |
| in addition to the bacteria in soil and in the roots of legumes, this occurence can fix nitrogen in the atmosphere | lightning |
| bacteria, legumes and decomposers all have a direct role in this cycle | nitrogen |
| the atmosphere is what percent nitrogen | 78 |
| What is a major reservoir of nitrogen | the atmosphere |
| excessive use of fertilizers can cause this in our waterways | algal blooms |
| What are the consequences of an algal bloom? | lots of algae, little or no oxygen, fish kills |
| When algal blooms occur in our waterways, we know this process is underway | eutrophication |
| nutrient pollution (nitrogen & Phosphorus) | eutrophication |
| anything introduced into an ecosystem that causes harm to organisms | pollution |
| example of pollution we have studied recently | eutrophication by excess fertilizer use |
Created by:
mrstolan
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