Cycles within ecosystems — Edexcel International GCSE Biology
The carbon cycle with photosynthesis, respiration, decomposition and combustion, and the roles of bacteria in the nitrogen cycle.
Revision notes
2 short notes, in the order of the specification.
- The carbon cycle
- The nitrogen cycleBiology only
Exam questions
6 exam-style questions (17 marks), each with its mark scheme.
Answer the questionsFlashcards
8 cards: flip them, mark what you knew, and practise the rest.
Practise the cardsMind map
The whole of ecology and the environment on one page, so you can see where this subtopic fits.
Open the mind mapPrint it
Free PDFs to print or save.