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 12
A lake receives runoff from nearby farms containing high levels of nitrogen and phosphorus. What is the likely ecological consequence?
Describe how deforestation can affect the carbon cycle.
Describe the impact of excessive fertilizer use on the nitrogen and phosphorus cycles.
Describe the process of eutrophication and its relation to the phosphorus cycle.
Describe the process of mineralization in the context of biogeochemical cycles.
Describe the role of decomposers in the carbon cycle.
Explain how fossil fuel combustion affects the carbon cycle.
A lake receives runoff from nearby farms containing high levels of nitrogen and phosphorus. What is the likely ecological consequence?
Which element is most likely to limit plant growth in freshwater ecosystems due to its slow cycling? (1) Carbon (2) Nitrogen (3) Phosphorus (4) Oxygen
Which of the following is a biological process in the carbon cycle? (1) Weathering (2) Photosynthesis (3) Combustion (4) Erosion
Which of the following is a gaseous biogeochemical cycle? (1) Phosphorus cycle (2) Sulfur cycle (3) Nitrogen cycle (4) Both 2 and 3
Which of the following is a major reservoir of phosphorus in the environment? (1) Atmosphere (2) Rocks (3) Oceans (4) Plants
Fill in the blank: The largest reservoir of carbon on Earth is found in __________.
Fill in the blank: The process by which plants absorb carbon dioxide and convert it into glucose is called __________.
Fill in the blank: The process by which plants take up nitrates from the soil is called __________.
Fill in the blank: The process by which sulfur is released into the atmosphere from volcanic eruptions is called __________.
True or False: All biogeochemical cycles are closed systems on a global scale.
True or False: Human activities have no impact on the nitrogen cycle.
True or False: Phosphorus is mainly cycled through the atmosphere.
True or False: The carbon cycle involves both biological and geological processes.
