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The Nitrogen Cycle

Horizontales
The biological oxidation of ammonia or ammonium to nitrate followed by the oxidation of nitrate to nitrate
The amount of nitrogen in the atmosphere (a percent, no spaces)
A microbially facilitated process of nitrate reductions preformed by heterotrophic anaerobic bacteria
Process in which nitrogen in the atmosphere is converted into ammonium or nitrogen dioxide
Verticales
Bacteria are able to convert ammonia to nitrate
Plants/Animals die and the nitrogen compounds re-enter the soil where they are broken down by microorganisms known as decomposers
Chemical element with symbol N; transparent, odorless gas
The rate at which photosynthesis or chermosynthesis occurs (two words no spaces)