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 non-living environment to living organisms and back.

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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 atmosphere, land, water, and living organisms, involving processes like photosynthesis, respiration, and decomposition.

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What is the role of photosynthetic plants in the carbon cycle?

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Photosynthetic plants absorb atmospheric carbon dioxide and convert it into organic matter through photosynthesis.

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What are fossil fuels?

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Fossil fuels are natural substances formed from the remains of ancient plants and animals, primarily composed of carbon, and are used as energy sources.

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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.

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How does the sun contribute to the water cycle?

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The sun provides energy and heat, which powers the processes of evaporation and drives the water cycle.

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What is nitrogen fixation?

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Nitrogen fixation is the process of converting nitrogen gas from the atmosphere into ammonia or related compounds, making it usable by plants.

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Why is nitrogen important for living organisms?

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Nitrogen is essential for the formation of amino acids, proteins, and nucleic acids, which are vital for life.

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What are nitrates?

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Nitrates are compounds that contain nitrogen in a form that plants can absorb and use for growth.

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What is the role 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.