Ecology Exam Questions
Questions on ecosystems, food chains, adaptations, sampling methods, cycling materials (carbon and water cycles), biodiversity, human impacts, and sustainability. Download free past paper questions organised by topic with mark schemes.
Frequently Asked Questions
How do you calculate population size using quadrats?
Count organisms in quadrats → Calculate mean per quadrat → Multiply by total area ÷ quadrat area. Formula: Population = (mean count × total area) / quadrat area
What is a food chain vs food web GCSE Biology?
A food chain shows one linear feeding relationship. A food web shows multiple interconnected food chains in an ecosystem. Energy is lost at each trophic level (only ~10% transferred).
What is the carbon cycle GCSE Biology?
Carbon cycles through: photosynthesis (CO₂ removed), respiration (CO₂ released), combustion (CO₂ released), decomposition, and fossil fuel formation. Human activities are increasing atmospheric CO₂.
What human impacts on biodiversity are in GCSE Biology?
Key impacts: deforestation, pollution (land, water, air), global warming, peat bog destruction, and overfishing. You should also know conservation methods like breeding programmes and habitat protection.
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