biogeochemical cycles

Process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another

Chemical substance that an organism needs to sustain life

Process of converting nitrogen gas into nitrogen compounds that plants can absorb and use

Process by which soil bacteria convert nitrates into nitrogen gas

Single essential nutrient that limits productivity in an ecosystem

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unit 3; section 4

matter cycles

Term	Definition
biogeochemical cycles	Process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another
nutrients	Chemical substance that an organism needs to sustain life
nitrogen fixation	Process of converting nitrogen gas into nitrogen compounds that plants can absorb and use
dentrification	Process by which soil bacteria convert nitrates into nitrogen gas
limiting nutrients	Single essential nutrient that limits productivity in an ecosystem