Which process REMOVES carbon dioxide from the atmosphere?
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Practise IGCSE 0610 questions in the style of recent Extended past papers, organised by syllabus subtopic. Each set comes with an examiner-style mark scheme and a downloadable worksheet.
Everything students ask about Cambridge IGCSE 0610 Nutrient cycles Topical Past Papers.
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These Nutrient cycles Topical Past Paper Questions are written in the style of recent Cambridge IGCSE Biology 0610 Extended papers and grouped by the Organisms and their environment (B19.3) section of the 2025–2027 syllabus. Use them to revise the exact skills examiners test in this part of the course.
Each question is graded Easy → Medium → Hard, plus an A★ Challenge for top-grade preparation. Tap a question to mark your own answer, then unlock the examiner-style mark scheme with model solutions and examiner tips. A printable Topical Past Papers worksheet is included so you can practise offline.
Describe the carbon cycle: photosynthesis, respiration, feeding, decomposition and combustion. Extended candidates describe the water cycle and the importance of nitrogen-fixing, nitrifying and denitrifying bacteria in the nitrogen cycle.
Which process REMOVES carbon dioxide from the atmosphere?
Name TWO processes that release carbon dioxide INTO the atmosphere.
[2 marks]Which type of organism is MOST IMPORTANT for releasing carbon and nitrogen from dead organisms back into the environment?
Describe the carbon cycle by naming THREE processes that move carbon between living organisms and the atmosphere.
[3 marks]Which type of bacteria converts atmospheric nitrogen gas (N₂) into nitrogen-containing compounds plants can use?
Describe the role of NITRIFYING bacteria and DENITRIFYING bacteria in the nitrogen cycle (Extended).
[3 marks]Explain how the WATER CYCLE returns water from organisms / land back to the atmosphere.
[3 marks]Farmers often plant LEGUME crops (e.g. peas, beans, clover) in rotation with cereal crops. Why does this help maintain soil fertility?