Ecology questions often feel approachable but cost marks when students ignore data, units, or levels of organisation (organism → ecosystem).

Hub: Biology GCSE questions.

Typical ecology GCSE question types

Food webs and energy (3–5 marks)

• Explain why the biomass at the top of this food chain is smaller than at the bottom.

Energy loss at each trophic level; respiration, waste, not all eaten—not “energy disappears”.

Cycles (carbon, water)

• Describe how carbon dioxide enters and leaves a woodland ecosystem.

Photosynthesis, respiration, combustion, decomposition—as relevant to the stem.

Sampling and reliability (maths + method)

• A student uses 10 quadrats along one edge of a field. Suggest two improvements to make the estimate more valid.

Random placement, more quadrats, calculate mean—link to maths skills.

Human impact (explain / evaluate)

• Explain how deforestation may increase atmospheric carbon dioxide.

Fewer trees removing CO₂; decomposition/burning; link to climate if asked.

Biodiversity and conservation

• Suggest one advantage of protecting a wetland habitat.

Species preservation, flood control, water quality—two distinct points if 2 marks.

FAQ

Are fieldwork questions practical-based?

Often—they test method, variables, and evaluation, not outdoor experience itself.

Data & graphs guide →

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