Biogeochemical cycles

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What are biogeochemical cycles?

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Biogeochemical cycles are natural processes that recycle nutrients in various chemical forms from the environment to organisms and back to the environment.

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What is the carbon cycle?

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The carbon cycle is the process by which carbon is exchanged among the biosphere, geosphere, hydrosphere, and atmosphere of the Earth.

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Where is carbon stored in the environment?

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Carbon is stored in fossil fuels, wood of trees, and calcium carbonate (shells and bones).

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What is photosynthesis?

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Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll, converting carbon dioxide and water into glucose and oxygen.

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What is the role of denitrifying bacteria?

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Denitrifying bacteria return nitrogen into the atmosphere in the form of N2 gas.

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What is nitrogen fixation?

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Nitrogen fixation is the process in which certain bacteria convert nitrogen gas (N2) from the atmosphere into ammonia (NH3), making it available for plants.

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What human activities increase CO2 levels in the atmosphere?

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Human activities such as burning fossil fuels and deforestation increase CO2 levels in the atmosphere.

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What is the nitrogen cycle?

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The nitrogen cycle is the series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms.

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What is the significance of decomposers in biogeochemical cycles?

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Decomposers break down dead organic matter, returning nutrients to the soil and making them available for plants.

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What is the water cycle?

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The water cycle is the continuous movement of water on, above, and below the surface of the Earth, involving processes like evaporation, condensation, and precipitation.