Nutrient cycles — Cambridge IGCSE Biology
How carbon is cycled by photosynthesis, respiration, feeding, decomposition and combustion, and how bacteria move nitrogen through the nitrogen cycle.
Revision notes
2 short notes, in the order of the specification.
- The carbon cycle
- The nitrogen cycleSupplement
Exam questions
6 exam-style questions (18 marks), each with its mark scheme.
Answer the questionsFlashcards
10 cards: flip them, mark what you knew, and practise the rest.
Practise the cardsMind map
The whole of organisms and their environment on one page, so you can see where this subtopic fits.
Open the mind mapPrint it
Free PDFs to print or save.