Nitrogen Cycle Flashcard

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What is the Nitrogen Cycle?

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The Nitrogen Cycle is the process by which nitrogen is converted between its various chemical forms, including nitrogen fixation, nitrification, and denitrification, allowing it to be used by living organisms.

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Where can you find the special bacteria that helps in Nitrogen-Fixation?

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On the roots of plants.

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How does Nitrogen reach soil?

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Nitrogen reaches the soil from precipitation.

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What is ammonia?

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Ammonia is a compound of nitrogen and hydrogen (NH3) that is toxic to plants and animals but can be used by plants in small amounts.

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What role do decomposers play in the Nitrogen Cycle?

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Decomposers change decaying matter and waste back into nitrogen, returning it to the soil.

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What is Nitrogen-Fixation?

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Nitrogen-Fixation is the process by which nitrogen gas (N2) is converted into ammonia (NH3) or related compounds in soil, making it available for plants.

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What is nitrification?

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Nitrification is the process by which ammonia is converted into nitrites (NO2-) and then into nitrates (NO3-), which can be absorbed by plants.

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What is denitrification?

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Denitrification is the process by which nitrates are converted back into nitrogen gas (N2), returning it to the atmosphere.

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Why is nitrogen important for plants?

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Nitrogen is essential for plants as it is a key component of amino acids, proteins, and nucleic acids, which are vital for growth and development.

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What is the impact of excess nitrogen in the environment?

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Excess nitrogen can lead to water pollution, algal blooms, and disruption of ecosystems.