The harmful effects of non-metal compounds on the environment and health: acid rain, global warming, ozone depletion, eutrophication, and ways of reducing pollution.
5 narrated scenes. Press play, listen and read along — the points appear as they are explained. Use ‹ Prev / Next › or the scene bar to jump to any scene.
A hurricane season that gets stronger, reefs that bleach, and fish dying after heavy rain on farmland. Behind each of these is a chemical pollutant.
Narration uses your device’s built-in voice. No sound? Switch to “Captions only” — the captions advance on their own.
Copy these into your notebook in your own words — that is how they stick.
SO₂ and NOₓ dissolve in rain; pH < 5.6.
Kills fish and trees; damages limestone; corrodes metals.
CO₂, CH₄, CFCs, water vapour.
Sea-level rise, stronger hurricanes, coral bleaching.
CFCs destroy ozone; more UV.
Binds haemoglobin; from incomplete combustion.
Fertilisers → algal bloom → oxygen depletion.
Catalytic converters, scrubbers, renewable energy.
3 quick games on this lesson. Earn XP and badges as you play — your best score for each game is saved. Games are for practice and do not change your exam readiness. More games in the Chemistry Arcade.
8 items modelled on real CSEC Paper 1 questions. Choose one answer for each, then check. Aim for 80% or better. Work each item on paper first.
Write full answers, then reveal the mark scheme and tick the points you earned (15 marks in total). Show all your working — method marks count. Your answers are saved on this device.
Question 1 [15 marks]
Sulfur dioxide, carbon dioxide and nitrates are among the pollutants released by human activity.
(a) (a) State one source of sulfur dioxide. [1]
(b) (b) Explain how sulfur dioxide causes acid rain and give two effects. [4]
(c) (c) Explain how carbon dioxide leads to global warming. [3]
(d) (d) Suggest two effects of global warming on Caribbean countries. [2]
(e) (e) Describe how fertiliser run-off leads to fish deaths. [3]
(f) (f) Suggest two ways of reducing air pollution. [2]
Find these in your own past-paper booklets for extra timed practice. Items above are written in the style of these papers; any adapted from a specific question say so.