Science

10th -

12thgrade

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Biogeochemical Cycles

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15 questions

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  • 1. Multiple Choice
    30 seconds
    1 pt
    Where is carbon stored in the environment?
    Fossil fuels
    Wood of trees
    Calcium carbonate (shells and bones)
    All of the above
  • 2. Multiple Choice
    30 seconds
    1 pt
    Which is NOT a way that nitrogen compounds are added to the soil?
    Decay of dead organisms
    Denitrification
    Animal waste
    Nitrogen-fixation
  • 3. Multiple Choice
    30 seconds
    1 pt
    What happens during the process of nitrogen-fixation?
    Nitrogen compounds turn into free nitrogen
    Free nitrogen turns into nitrogen compounds
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