GCSE Biodiversity and Ecosystems

This comprehensive revision resource covers the Biodiversity and Ecosystems topic from the AQA GCSE Combined Science Biology specification. Designed as an accessible comprehension activity, it provides clear revision notes followed by 15 exam‑style questions with a full mark scheme included.

Topics covered:

What biodiversity is, why it matters, and how high biodiversity increases ecosystem stability (e.g., interdependence, resilience, food‑web security)
Human population growth and its impacts, including habitat loss, resource use and different forms of pollution affecting land, water and air
Water and land pollution, including sewage, fertilisers, plastics, pesticides, herbicides and industrial waste, and how these affect ecosystems (e.g. eutrophication, contamination, bioaccumulation)
Air pollution such as acid rain, particulates and smog, and their effects on health, plants, soils and aquatic systems
Deforestation and peat destruction, including impacts on biodiversity, carbon storage and climate regulation
The greenhouse effect versus global warming, causes of enhanced warming and impacts on species distribution, migration, phenology and ecosystem balance
Conservation strategies such as breeding programmes, habitat protection, hedgerows, field margins, sustainable forestry, and recycling as ways to reduce environmental impact and protect species

What’s included:

A full Word document with structured, student‑friendly revision notes and 15 high‑quality comprehension questions aligned to AQA specification requirements
A separate model‑answer mark scheme with marking guidance for every question
A glossary of key scientific terms to support accessibility and independent revision

Perfect for:

GCSE Combined Science Biology (Foundation and Higher support)
Retrieval practice, revision lessons, homework or intervention
Pre‑assessment preparation or independent study