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Nitrogen cycle

Quiz by Theuns Swanepoel

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10 questions
Show answers
  • Q1
    Which process in the nitrogen cycle converts nitrogen gas into ammonia?
    Denitrification
    Nitrification
    Nitrogen fixation
    Ammonification
    30s
  • Q2
    What is the final step in the nitrogen cycle?
    Nitrification
    Nitrogen fixation
    Ammonification
    Denitrification
    30s
  • Q3
    What is the role of plants in the nitrogen cycle?
    Plants take up nitrogen from the soil and incorporate it into their tissues
    Plants convert nitrogen gas into ammonia
    Plants release nitrogen gas into the atmosphere
    Plants break down organic nitrogen compounds into ammonia
    30s
  • Q4
    Which process removes carbon dioxide from the atmosphere?
    Evaporation
    Photosynthesis
    Erosion
    Combustion
    30s
  • Q5
    Which process returns carbon dioxide to the atmosphere?
    Respiration
    Photosynthesis
    Weathering
    Condensation
    30s
  • Q6
    What is carbon sequestration?
    The process of converting carbon dioxide into oxygen.
    The process of capturing and storing carbon dioxide from the atmosphere.
    The process of releasing carbon dioxide into the atmosphere.
    The process of removing carbon from the soil.
    30s
  • Q7
    What is eutrophication?
    The contamination of water with harmful chemicals.
    The destruction of aquatic habitats due to pollution.
    The depletion of oxygen in a body of water.
    The excessive growth of algae and other aquatic plants due to an increased concentration of nutrients in the water.
    30s
  • Q8
    Which of the following is true about nitrogen-fixing bacteria?
    They are harmful to plants
    They convert atmospheric nitrogen into usable forms for plants
    They only live in aquatic environments
    They require sunlight to function
    30s
  • Q9
    Which of the following is a mutualistic relationship involving nitrogen-fixing bacteria?
    Bacteria causing diseases in plants
    Bacteria living in the root nodules of legume plants
    Bacteria inhibiting plant growth
    Bacteria competing with plants for nutrients
    30s
  • Q10
    Which of the following is a natural fertilizer?
    Pesticide
    Compost
    Fungicide
    Herbicide
    30s

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