Biogeochemical Cycles
Quiz by Russ Drylie
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22 questions
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- Q1What is the primary source of carbon dioxide in the atmosphere?Volcanic activityPhotosynthesisBurning fossil fuelsDecomposition30s
- Q2How is carbon stored in the Earth's crust for millions of years?TranspirationErosionRespirationFossilization30s
- Q3During which process is carbon dioxide absorbed from the atmosphere?CombustionPhotosynthesisWeatheringRespiration30s
- Q4What is the primary reservoir of carbon in the Earth's carbon cycle?The lithosphereThe oceansThe biosphereThe atmosphere30s
- Q5During which step of the nitrogen cycle do certain bacteria convert ammonium into nitrite?Nitrogen fixationDenitrificationAmmonificationNitrification30s
- Q6During which step of the nitrogen cycle do plants absorb nitrate and incorporate it into their tissues?AssimilationAmmonificationNitrificationDenitrification30s
- Q7Which process in the nitrogen cycle converts nitrogen gas (N2) into ammonia (NH3)?AssimilationNitrificationDenitrificationNitrogen fixation30s
- Q8Which step of the nitrogen cycle involves the conversion of nitrate (NO3-) into nitrogen gas (N2)?NitrificationNitrogen fixationAssimilationDenitrification30s
- Q9Which step of the nitrogen cycle involves the conversion of organic nitrogen into ammonium (NH4+)?AmmonificationAssimilationNitrificationDenitrification30s
- Q10Which of the following human activities can contribute to an increase in phosphorus levels in water bodies?Renewable energy generationFertilizer applicationRecycling plasticsCarpooling30s
- Q11Phosphorus 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 oxidePhosphorus gasPhosphorus hydroxidePhosphate30s
- Q12What is the primary source of phosphorus in the phosphorus cycle?Volcanic eruptionsAtmospheric depositionBiological processesWeathering of rocks30s
- Q13Which of the following is NOT a sink for phosphorus in the phosphorus cycle?Rocks and mineralsSedimentsLiving organismsAtmosphere30s
- Q14Phosphorus is a vital component of which molecule essential for energy storage and transfer in living organisms?LipidsATPCarbohydratesProteins30s
- Q15What is the main source of energy that fuels the hydrologic cycle?Solar radiationWind energyNuclear fusionGeothermal heat30s