Biogeochemical Cycles

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What is Nitrogen Fixation?

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The process of converting nitrogen gas (N2) from the atmosphere into ammonia (NH3) or related compounds in soil, making it available for plants and animals.

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How does carbon dioxide enter the food chain?

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Carbon dioxide leaves the atmosphere and becomes part of the food chain through the process of photosynthesis, where plants convert CO2 into glucose.

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What role do bacteria play in the nitrogen cycle?

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Bacteria convert nitrogen gas into a usable form for plants and animals, primarily through nitrogen fixation and nitrification.

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What percentage of the atmosphere is nitrogen gas?

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78% of the atmosphere is composed of nitrogen gas.

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How do plants uptake nitrogen?

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Plants absorb nitrogen compounds from the soil, such as nitrates and ammonium, which are essential for their growth.

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What is the process of 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 decomposition in the context of biogeochemical cycles?

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Decomposition is the process by which organic substances are broken down into simpler organic or inorganic matter, recycling nutrients back into the ecosystem.

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What is the significance of the carbon cycle?

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The carbon cycle is crucial for regulating Earth's climate and supporting life by cycling carbon through the atmosphere, biosphere, oceans, and geosphere.

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What are nitrates?

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Nitrates are nitrogen compounds (NO3-) that are essential nutrients for plants, formed through the nitrification process.

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What is the role of fungi in biogeochemical cycles?

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Fungi decompose organic matter, breaking it down into simpler substances and recycling nutrients back into the soil.