Nitrogen Cycle Flashcard

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What percent of the atmosphere is nitrogen?

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78%

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What is ammonia?

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Ammonia is a compound of nitrogen and hydrogen, often used in fertilizers but is toxic to plants in high concentrations.

Front

What role does ammonia play in the nitrogen cycle?

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Ammonia is produced during the decomposition of organic matter and is a key component in the nitrogen cycle.

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What helps the process of Nitrogen-Fixation?

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Special bacteria, such as Rhizobium, help convert nitrogen gas from the atmosphere into ammonia.

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

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On the roots of leguminous plants.

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What do plants use to make their own proteins?

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Plants use nitrates, which are derived from ammonia, to synthesize proteins.

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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 in soil.

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Why is nitrogen important for plants?

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Nitrogen is a vital nutrient that is a key component of amino acids, proteins, and nucleic acids.

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What is the role of nitrifying bacteria in the nitrogen cycle?

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Nitrifying bacteria convert ammonia into nitrites and then into nitrates, which plants can absorb.

Front

What is denitrification?

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