Biogeochemical Cycles
Biology ⇒ Ecology and Environment
Biogeochemical Cycles starts at 8 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Biogeochemical Cycles.
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See sample questions for grade 11
Describe how volcanic eruptions can influence the carbon cycle.
Describe one way in which human activities have altered the carbon cycle.
Describe the process of ammonification in the nitrogen cycle.
Describe the process of denitrification and its ecological significance.
Describe the role of oceans in the carbon cycle.
Explain how deforestation can affect the carbon cycle.
Explain the impact of eutrophication on aquatic ecosystems.
Explain the importance of nitrogen-fixing bacteria in ecosystems.
Explain the role of decomposers in the carbon cycle.
Explain why phosphorus is often a limiting nutrient in aquatic ecosystems.
A lake receives runoff from nearby agricultural fields that contain high levels of phosphate fertilizers. Over time, the lake experiences a rapid increase in algal growth, followed by a decline in fish populations. Explain the biogeochemical processes responsible for these changes.
Compare and contrast the roles of autotrophs and heterotrophs in the cycling of carbon within an ecosystem.
Describe the role of weathering in the phosphorus cycle and explain why this process is considered slow compared to other nutrient cycles.
Explain how acid rain can influence the sulfur and nitrogen cycles in terrestrial ecosystems.
Explain how the process of biomagnification can affect the cycling of elements such as mercury or nitrogen compounds in an ecosystem.
