Biogeochemical Cycle: The Nitrogen Cycle Quiz

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Biogeochemical Cycle: The Nitrogen Cycle Quiz - Quiz

Are you a curious human interested in the biogeochemical and nitrogen cycle or general knowledge about this? The quiz will assist you in identifying the facts and answering questions about them. Share the quiz with friends to see who amongst you knows more and help enhance their knowledge.


Questions and Answers
  • 1. 

    Approximately ___ % of the worlds atmosphere is comprised of Nitrogen.

    • A.

      69%

    • B.

      78%

    • C.

      50%

    • D.

      87%

    Correct Answer
    B. 78%
    Explanation
    Approximately 78% of the world's atmosphere is comprised of Nitrogen. This is a significant percentage, indicating that Nitrogen is the most abundant gas in the Earth's atmosphere. It plays a crucial role in various biological processes and is essential for the growth of plants and animals. Nitrogen also helps to regulate the Earth's climate and acts as a buffer against harmful radiation from the sun. Its high concentration in the atmosphere contributes to the overall stability and composition of the Earth's atmosphere.

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  • 2. 

    In what form does Nitrogen re-enter the Earth after the process of fixation?

    • A.

      Nitrogen

    • B.

      Ammonia

    • C.

      Oxygen

    • D.

      Oxide

    Correct Answer
    A. Nitrogen
    Explanation
    After the process of fixation, nitrogen re-enters the Earth in the form of nitrogen itself. Fixation is the process where atmospheric nitrogen is converted into a usable form by nitrogen-fixing bacteria or lightning. Once fixed, nitrogen can be utilized by plants and other organisms. Therefore, the correct answer is nitrogen.

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  • 3. 

    Select the 3 other different processes similar to Fixation.

    • A.

      Denitrification

    • B.

      Liquidification

    • C.

      Nitrification

    • D.

      Oxidation

    • E.

      Ammonification

    Correct Answer(s)
    A. Denitrification
    C. Nitrification
    E. Ammonification
    Explanation
    The correct answer is Denitrification, Nitrification, and Ammonification. These three processes are similar to Fixation because they all involve the transformation or conversion of nitrogen compounds. Denitrification is the process by which nitrate is converted back into nitrogen gas, while nitrification is the process by which ammonia is converted into nitrate. Ammonification, on the other hand, is the process by which organic nitrogen compounds are converted into ammonia. These processes play important roles in the nitrogen cycle, contributing to the availability and cycling of nitrogen in ecosystems.

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  • 4. 

    The process of Fixation is:

    • A.

      The process that causes the strong two-atom nitrogen molecules to break apart so they can combine with other atoms. When it combines with oxygen and hydrogen.

    • B.

      When nitrogen fixes itself to a plant.

    • C.

      When nitrate turns into ammonia, then ammonia turns into plants, then the animals eat the plants and it is turned back into nitrogen.

    • D.

      When nitrogen gets fixed.

    Correct Answer
    A. The process that causes the strong two-atom nitrogen molecules to break apart so they can combine with other atoms. When it combines with oxygen and hydrogen.
  • 5. 

    TRUE OR FALSE?Too much nitrogen can damage the plants natural green colour.

    • A.

      TRUE

    • B.

      FALSE

    Correct Answer
    B. FALSE
    Explanation
    Nitrogen is what gives plants their healthy green colour.

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  • 6. 

    Which order is correct?

    • A.

      Fixation, Dentrification, Nitrification, Ammonification

    • B.

      Fixation, Nitrification, Ammonification, Dentrification

    • C.

      Nitrification, Ammonification, Dentrification, Fixation

    • D.

      Fixation, Nitrification, Dentirfication, Ammonification

    Correct Answer
    B. Fixation, Nitrification, Ammonification, Dentrification
    Explanation
    The correct order is Fixation, Nitrification, Ammonification, Dentrification. Fixation refers to the process of converting atmospheric nitrogen into a form that can be used by plants. Nitrification is the conversion of ammonium into nitrate by bacteria. Ammonification is the process of converting organic nitrogen into ammonium ions. Dentrification is the final step in the nitrogen cycle, where nitrate is converted back into atmospheric nitrogen by bacteria.

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  • 7. 

    Why plants cannot utilize Nitrogen naturally occurring in the atmosphere?

    • A.

      They don't have nitrogen-fixing bacteria.

    • B.

      The amount of naturally occurring Nitrogen is not sufficient.

    • C.

      The triple bonds between 2 nitrogen atoms are hard to break.

    • D.

      None of the above.

    Correct Answer
    C. The triple bonds between 2 nitrogen atoms are hard to break.
    Explanation
    Plants cannot utilize nitrogen naturally occurring in the atmosphere because the triple bonds between two nitrogen atoms are hard to break. Nitrogen gas (N2) is very stable and cannot be directly used by plants. It requires a process called nitrogen fixation, which is carried out by certain bacteria that can convert N2 into a form that plants can use, such as ammonia (NH3) or nitrate (NO3-). These bacteria have the ability to break the strong triple bonds in N2, making nitrogen available for plant growth.

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  • 8. 

    Which of the following are directly responsible for nitrogen fixation?

    • A.

      Bacteria

    • B.

      Humans

    • C.

      Animals

    • D.

      Sunlight

    Correct Answer
    A. Bacteria
    Explanation
    Bacteria are directly responsible for nitrogen fixation. Nitrogen fixation is the process by which atmospheric nitrogen is converted into a form that can be used by plants and other organisms. Certain bacteria, such as Rhizobium and Azotobacter, have the ability to convert atmospheric nitrogen into ammonia, which can then be used by plants to synthesize proteins and other nitrogen-containing compounds. Humans, animals, and sunlight do not have the ability to directly fix nitrogen.

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  • 9. 

    Where does on Earth Nitrogen exist in abundance?

    • A.

      Earth's atmosphere

    • B.

      Biosphere

    • C.

      Stratosphere

    • D.

      Troposphere

    Correct Answer
    A. Earth's atmosphere
    Explanation
    Nitrogen exists in abundance in Earth's atmosphere. It makes up about 78% of the air we breathe. The atmosphere is a layer of gases surrounding the Earth, and nitrogen is the most abundant gas in this layer. It is essential for life as it is a key component of proteins and DNA. Nitrogen also plays a vital role in the nitrogen cycle, which is crucial for the growth of plants and the overall balance of ecosystems.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 24, 2014
    Quiz Created by
    Randalv1
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