Human influences on ecosystems — IGCSE Sciences - Co-Ordinated (0973) questions by topic
Human influences on ecosystems questions read a pollution-source pie chart, name the gases released by catalytic converters, and identify which gas rises in concentration through deforestation and burning, worth from 1 to 10 marks in this IGCSE Co-ordinated Sciences set.
Identify, state and explain lead the command words, with complete and suggest also common: suggest a consequence tied to a named gas, not a vague environmental statement. 11 real questions from 2023 to 2025 papers sit below. Submitting each answer for instant marking shows precisely which named pollutant or process the mark scheme expected, rather than a general description.
May–June 2025, Paper 22
Which row shows a greenhouse gas and its environmental effect? gas environmental effect --- --- --- A methane acid rain B methane global warming C carbon monoxide acid rain D…
Answer this question and get it marked →Which statement explains how oxides of nitrogen are formed in a car engine? A Nitrogen from the air reacts with the fuel. B Oxygen and nitrogen from the air react together. C…
Answer this question and get it marked →May–June 2023, Paper 12
Which row about the effects of deforestation is correct? A risk of flooding: decreased; amount of carbon dioxide in atmosphere: decreased B risk of flooding: decreased; carbon…
Answer this question and get it marked →May–June 2023, Paper 21
What causes eutrophication? A combustion of fossil fuels B cutting down of forests C discarded plastic rubbish D overuse of nitrogen-containing fertiliser
Answer this question and get it marked →Which atmospheric pollutant is removed from air by lime? A ammonia B carbon monoxide C hydrocarbons D sulfur dioxide
Answer this question and get it marked →May–June 2023, Paper 22
Car engines produce pollutant gases. Which gases are removed by catalytic converters? A carbon monoxide, nitrogen monoxide and sulfur dioxide B carbon monoxide and nitrogen…
Answer this question and get it marked →May–June 2023, Paper 31
Fig. 4.1 shows different sources of pollution of the water in seas as a pie chart: agriculture 27%, untreated sewage 27%, chemical waste from air pollution 18%, chemical waste…
Answer this question and get it marked →October–November 2023, Paper 11
Forests are cut down and burnt in deforestation programmes. As a result of this, which gas in the atmosphere increases in concentration? A carbon dioxide B hydrogen C nitrogen D…
Answer this question and get it marked →October–November 2023, Paper 21
Forests are cut down and burnt in deforestation programmes. As a result of this, which gas in the atmosphere increases in concentration? A carbon dioxide B hydrogen C nitrogen D…
Answer this question and get it marked →Catalytic converters are fitted to cars to remove some gases from exhaust emissions. Which gases are released by catalytic converters? A carbon dioxide and nitrogen B carbon…
Answer this question and get it marked →October–November 2023, Paper 41
Fig. 10.1 shows aerial photographs of the same area taken in 1985 (A) and 2000 (B); forest is darker and cleared areas are lighter, showing deforestation. The change between 1985…
Answer this question and get it marked →Other IGCSE Sciences - Co-Ordinated topics
- Motion, forces and energy (77)
- Electricity and magnetism (65)
- Practical skills (60)
- Organic chemistry (40)
- Waves (40)
- Atoms, elements and compounds (29)
- Organisms and their environment (28)
- Stoichiometry (24)
- Chemical reactions (22)
- The Periodic Table (22)
- Human nutrition (21)
- Reproduction (21)