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Biogeochemical Cycles

Quiz by Russ Drylie

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22 questions
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  • Q1
    What is the primary source of carbon dioxide in the atmosphere?
    Volcanic activity
    Photosynthesis
    Burning fossil fuels
    Decomposition
    30s
  • Q2
    How is carbon stored in the Earth's crust for millions of years?
    Transpiration
    Erosion
    Respiration
    Fossilization
    30s
  • Q3
    During which process is carbon dioxide absorbed from the atmosphere?
    Combustion
    Photosynthesis
    Weathering
    Respiration
    30s
  • Q4
    What is the primary reservoir of carbon in the Earth's carbon cycle?
    The lithosphere
    The oceans
    The biosphere
    The atmosphere
    30s
  • Q5
    During which step of the nitrogen cycle do certain bacteria convert ammonium into nitrite?
    Nitrogen fixation
    Denitrification
    Ammonification
    Nitrification
    30s
  • Q6
    During which step of the nitrogen cycle do plants absorb nitrate and incorporate it into their tissues?
    Assimilation
    Ammonification
    Nitrification
    Denitrification
    30s
  • Q7
    Which process in the nitrogen cycle converts nitrogen gas (N2) into ammonia (NH3)?
    Assimilation
    Nitrification
    Denitrification
    Nitrogen fixation
    30s
  • Q8
    Which step of the nitrogen cycle involves the conversion of nitrate (NO3-) into nitrogen gas (N2)?
    Nitrification
    Nitrogen fixation
    Assimilation
    Denitrification
    30s
  • Q9
    Which step of the nitrogen cycle involves the conversion of organic nitrogen into ammonium (NH4+)?
    Ammonification
    Assimilation
    Nitrification
    Denitrification
    30s
  • Q10
    Which of the following human activities can contribute to an increase in phosphorus levels in water bodies?
    Renewable energy generation
    Fertilizer application
    Recycling plastics
    Carpooling
    30s
  • Q11
    Phosphorus is an essential element for the growth and development of living organisms. In which of the following forms is phosphorus most commonly found in the environment?
    Phosphorus oxide
    Phosphorus gas
    Phosphorus hydroxide
    Phosphate
    30s
  • Q12
    What is the primary source of phosphorus in the phosphorus cycle?
    Volcanic eruptions
    Atmospheric deposition
    Biological processes
    Weathering of rocks
    30s
  • Q13
    Which of the following is NOT a sink for phosphorus in the phosphorus cycle?
    Rocks and minerals
    Sediments
    Living organisms
    Atmosphere
    30s
  • Q14
    Phosphorus is a vital component of which molecule essential for energy storage and transfer in living organisms?
    Lipids
    ATP
    Carbohydrates
    Proteins
    30s
  • Q15
    What is the main source of energy that fuels the hydrologic cycle?
    Solar radiation
    Wind energy
    Nuclear fusion
    Geothermal heat
    30s

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