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UPCAT - General Science
IX. Ecology
Cycles in the ecosystem
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Vernalica Mae
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water cycle is when water evaporates into water vapor which then condenses and released back to earth in the form of precipitation
carbon-oxygen cycle
is the process of carbon dioxide being converted into oxygen
nitrogen cycle
is the process by which nitrogen is recycled in the environment
nitrogen cycle involves:
nitrate
ions
ammonium
ions
urea
nitrogen fixation
is the breaking apart of nitrogen molecule
atmospheric fixation
is a way of nitrogen fixation by lightning, dissolving in rain which forms nitrates
biological fixation
is nitrogen fixation by microbes which requires ATP
ATP stands for
adenosine triphosphate
ATP
is the major energy provider of the cell
industrial fixation
is a nitrogen fixation which produces ammonia and urea and ammonium nitrate
phosphorus cycle
is when phosphate weathers from rocks and minerals