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 8
Describe one way in which human activities can disrupt the nitrogen cycle.
Describe the process of ammonification in the nitrogen cycle.
Describe the role of decomposers in the phosphorus cycle.
Explain how animals contribute to the carbon cycle.
Explain how deforestation can affect the carbon cycle.
Explain the role of bacteria in the nitrogen cycle.
Explain why biogeochemical cycles are important for life on Earth.
Explain why the water cycle is important for living organisms.
Which of the following best describes eutrophication? (1) Increase in oxygen in water (2) Excess nutrients in water causing algal blooms (3) Decrease in soil fertility (4) Increase in forest cover
Which of the following best describes the term 'biogeochemical cycle'? (1) The movement of energy through an ecosystem (2) The movement of chemical elements between living and nonliving parts of the environment (3) The process of photosynthesis (4) The flow of water in rivers
Which of the following is a direct result of excessive use of fertilizers in agriculture? (1) Eutrophication (2) Deforestation (3) Desertification (4) Acid rain
Which of the following is a human activity that increases the amount of carbon dioxide in the atmosphere? (1) Planting forests (2) Burning coal (3) Using wind energy (4) Recycling
Fill in the blank: The process by which plants absorb water from the soil is called __________.
Fill in the blank: The process by which plants take in carbon dioxide and release oxygen is called __________.
Fill in the blank: The process by which plants use sunlight to make food and release oxygen is called __________.
Fill in the blank: The process by which water falls from the atmosphere to the Earth's surface is called __________.
Is the following statement true or false? Decomposers play a key role in recycling nutrients in biogeochemical cycles.
True or False: All biogeochemical cycles are closed systems on Earth.
True or False: Animals obtain phosphorus by eating plants or other animals.
True or False: Lightning can help convert nitrogen gas into a form usable by plants.
