Carbon and nitrogen Cycle

Front

What is the carbon cycle?

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The carbon cycle is the process by which carbon is exchanged between the atmosphere, land, water, and living organisms. It involves processes like photosynthesis, respiration, decomposition, and combustion.

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What is nitrogen fixation?

Back

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

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What role do bacteria play in the nitrogen cycle?

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Bacteria are essential for nitrogen fixation and nitrification, converting nitrogen gas into usable forms for plants and converting ammonia into nitrates.

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What is the process of evaporation?

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Evaporation is the process by which water changes from a liquid to a gas, typically occurring when water is heated.

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What is condensation?

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Condensation is the process by which water vapor in the air cools and changes back into liquid water, forming clouds or dew.

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Why is nitrogen important for living organisms?

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Nitrogen is crucial for building proteins and nucleic acids (DNA and RNA), which are essential for growth and reproduction.

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What percentage of the atmosphere is nitrogen gas?

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Approximately 78% of the atmosphere is composed of nitrogen gas.

Front

What is the role of photosynthesis in the carbon cycle?

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Photosynthesis is the process by which plants convert carbon dioxide from the atmosphere into glucose and oxygen, using sunlight.

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What is the role of decomposition in the carbon cycle?

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Decomposition is the process by which dead organic matter is broken down by microorganisms, releasing carbon back into the atmosphere as carbon dioxide.

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What is nitrification?

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Nitrification is the process by which ammonia is converted into nitrites and then into nitrates by bacteria in the soil.