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Human influences on the environment
Practice Questions

20 CIE IGCSE Biology questions on Human influences on the environment, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Human influences on the environment

Question 1 · 1 mark · Difficulty 2/3

The table shows carbon dioxide emissions from different sources in a developing country. Which change would have the greatest effect on reducing total emissions? Source | CO₂ emissions (million tonnes/year) Transport | 45 Electricity generation | 120 Industry | 38 Agriculture | 12

  1. replacing coal-fired power stations with renewable energy sources
  2. encouraging farmers to reduce cattle numbers
  3. improving public transport to reduce car use
  4. implementing carbon capture technology in factories
Show answer & explanation
✓ Answer: Areplacing coal-fired power stations with renewable energy sources
Award 1 mark for replacing coal-fired power stations with renewable energy sources. Electricity generation produces 120 million tonnes, the largest contribution. B is incorrect — agriculture produces only 12 million tonnes. C is incorrect — transport produces 45 million tonnes, less than electricity. D is incorrect — industry produces 38 million tonnes, less than electricity generation.
Question 2 · 1 mark · Difficulty 2/3

A study in Brazil showed that when rainforest is cleared for cattle farming, the soil becomes infertile after 3–4 years. Which process is the main cause of this soil infertility?

  1. leaching of nutrients by heavy rainfall
  2. eutrophication caused by fertiliser run-off
  3. bioaccumulation of pesticides in the soil
  4. increased nitrogen fixation by bacteria
Show answer & explanation
✓ Answer: Aleaching of nutrients by heavy rainfall
Award 1 mark for leaching of nutrients by heavy rainfall. When forest cover is removed, heavy tropical rainfall washes nutrients from the topsoil into deeper layers or away completely. B is incorrect — eutrophication occurs in water bodies, not soil. C is incorrect — bioaccumulation refers to toxins increasing in concentration up food chains. D is incorrect — nitrogen fixation would improve soil fertility, not reduce it.
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CIE IGCSE Biology: Human influences on the environment FAQ

How many CIE IGCSE Biology questions on Human influences on the environment are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Human influences on the environment for CIE IGCSE Biology, 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 Biology?
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 Human influences on the environment practice with other Biology 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 Human influences on the environment questions aligned to the official CIE IGCSE Biology syllabus?
Every question is written against the published CIE IGCSE Biology 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 Human influences on the environment typically tested on CIE IGCSE Biology papers?
Human influences on the environment appears across multiple question types on real CIE IGCSE Biology 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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