GCSE Organising an Ecosystem

This detailed revision resource covers the Organising an Ecosystem topic from the AQA GCSE Combined Science Biology specification. Structured as a comprehension‑based activity, it provides clear, accessible revision notes followed by 15 exam‑style questions with a full model‑answer mark scheme included.

Topics covered:

Feeding relationships within ecosystems, including food chains, producers, consumers, biomass transfer and pyramids of biomass
Predator–prey cycles and how population changes occur over time in stable communities
The decay cycle, the role of decomposers and detritivores, and how conditions such as temperature, moisture and oxygen availability affect decomposition
The water cycle, including evaporation, transpiration, condensation, precipitation, infiltration and the movement of water through living organisms
The carbon cycle, including photosynthesis, feeding, respiration, decomposition, combustion and long‑term carbon stores
Factors affecting biomass at different trophic levels and ecological responses to changes in abiotic or biotic conditions
Human uses of controlled decay such as composting
Key ecological sampling methods such as quadrats, random sampling, transects and calculating means

What’s included:

A full Word document containing clear revision notes and 15 comprehension questions aligned with AQA GCSE Biology ecology content
A complete, separate mark scheme Word document with model answers and detailed marking guidance
A glossary of essential ecological terminology to support revision and accessibility

Perfect for:

GCSE Combined Science Biology (Foundation and Higher learners)
Revision lessons, homework tasks, pre‑assessment preparation and retrieval practice