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# Biogeochemical Cycles Summary Biogeochemical cycles are processes that move and transform essential elements in nature. Here's a summary of each cycle: ## 1. Carbon Cycle * Carbon moves between the air, organisms, and soil. * Plants take in carbon dioxide (CO2) during photosynthesis, creating c...

# Biogeochemical Cycles Summary Biogeochemical cycles are processes that move and transform essential elements in nature. Here's a summary of each cycle: ## 1. Carbon Cycle * Carbon moves between the air, organisms, and soil. * Plants take in carbon dioxide (CO2) during photosynthesis, creating carbohydrates. * Animals obtain carbon by consuming plants. * When organisms die, they release carbon back into the soil. ## 2. Water Cycle * Water circulates on Earth through evaporation, condensation, and precipitation. * The sun heats water bodies, causing evaporation. * The vapor cools and forms clouds, which eventually become rain or snow. ## 3. Nitrogen Cycle * Atmospheric nitrogen is fixed by bacteria, converting it into forms usable by plants (like nitrate). * Animals obtain nitrogen by consuming plants. * Animal waste and decomposition release nitrogen back into the soil. ## 4. Phosphorus Cycle * Phosphorus is found in rocks and minerals. * This cycle does not involve the atmosphere. * Plants absorb phosphorus from the soil. * When plants die, phosphorus returns to the soil. * Phosphorus is essential for life, but its scarcity can limit plant growth. All these cycles maintain ecosystem balance and are vital for life on Earth.