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Elements of the Geochemical Cycles
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Water Cycle
Key processes include evaporation, transpiration, condensation, precipitation, and infiltration. The water cycle distributes fresh water across the globe, supports all ecosystems, and drives weather patterns.
Phosphorus Cycle
Key processes include weathering of rocks, absorption by plants, consumption by animals, and return to the environment through decomposition. Phosphorus is a critical nutrient for DNA and ATP, and its cycle does not include a gas phase.
Carbon Cycle
Key processes include photosynthesis, respiration, decomposition, and combustion. Carbon cycling is crucial for regulating Earth's climate by controlling the concentration of carbon dioxide in the atmosphere. It is a fundamental component of organic molecules and life.
Nitrogen Cycle
Key processes include nitrogen fixation, nitrification, assimilation, denitrification, and ammonification. The nitrogen cycle is essential for the synthesis of proteins and nucleic acids. It plays a critical role in agricultural systems.
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