Cambridge IGCSE Biology
19.3Nutrient cycles
Nutrient cycles in Cambridge IGCSE Biology: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic43 practice questions2 lessons
Overview
The nitrogen cycle is Supplement.
Learning objectives
What the syllabus expects you to be able to do.
- 19.3.1Describe the carbon cycle: photosynthesis, respiration, feeding, decomposition, formation of fossil fuels and combustion.
- 19.3.2Supplement: describe the nitrogen cycle and state the roles of microorganisms in decomposition, nitrification, nitrogen fixation and denitrification.
Lessons
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The carbon cycle
18 min
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The nitrogen cycle
18 min
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Sample question
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