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CIE · IGCSE · Co-ordinated Science (Double Award)

Organisms and their environment: ecosystems and food webs
Practice Questions

20 CIE IGCSE Co-ordinated Science (Double Award) questions on Organisms and their environment: ecosystems and food webs, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Organisms and their environment: ecosystems and food webs

Question 1 · 1 mark · Difficulty 1/3

A food chain reads: grass → rabbit → fox. In this food chain, the rabbit is best described as which of the following?

  1. A primary consumer that feeds on a producer
  2. A producer that makes its own food using sunlight
  3. A secondary consumer that feeds on a primary consumer
  4. A decomposer that breaks down dead organic matter
Show answer & explanation
✓ Answer: A — A primary consumer that feeds on a producer
The rabbit feeds directly on grass, which is the producer, making the rabbit a primary consumer. Option A is incorrect because the rabbit cannot photosynthesise. Option C is incorrect because secondary consumers feed on primary consumers, not producers. Option D is incorrect because decomposers break down dead material and are not part of a food chain in this way.
Question 2 · 1 mark · Difficulty 1/3

Which of the following best describes the role of decomposers in an ecosystem?

  1. They convert light energy into chemical energy in organic molecules
  2. They capture carbon dioxide from the air and store it in biomass
  3. They feed on living animals and transfer energy up the food chain
  4. They break down dead organisms and return mineral ions to the soil
Show answer & explanation
✓ Answer: D — They break down dead organisms and return mineral ions to the soil
Decomposers such as bacteria and fungi break down dead organic material through digestion and respiration, releasing mineral ions back into the soil for uptake by plants. Option A describes photosynthesis carried out by producers. Option B describes predation by consumers. Option D also describes producers fixing carbon through photosynthesis.
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CIE IGCSE Co-ordinated Science (Double Award): Organisms and their environment: ecosystems and food webs FAQ

How many CIE IGCSE Co-ordinated Science (Double Award) questions on Organisms and their environment: ecosystems and food webs are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Organisms and their environment: ecosystems and food webs for CIE IGCSE Co-ordinated Science (Double Award), with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CIE paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CIE IGCSE students preparing for Co-ordinated Science (Double Award)?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Organisms and their environment: ecosystems and food webs practice with other Co-ordinated Science (Double Award) topics or even switch to a totally different CIE subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Organisms and their environment: ecosystems and food webs questions aligned to the official CIE IGCSE Co-ordinated Science (Double Award) syllabus?
Every question is written against the published CIE IGCSE Co-ordinated Science (Double Award) specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CIE paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CIE.
How is Organisms and their environment: ecosystems and food webs typically tested on CIE IGCSE Co-ordinated Science (Double Award) papers?
Organisms and their environment: ecosystems and food webs appears across multiple question types on real CIE IGCSE Co-ordinated Science (Double Award) papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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