Free practice on Pollution for Class 4, following the Cameroon primary school curriculum (English subsystem). Every answer is explained, so a parent who is not sure of the answer can still help.
Smoke from vehicles causes air pollution. Chemicals dumped in a river cause water pollution. Loud constant noise from machines causes noise pollution.
| Type | Example cause |
|---|---|
| Air pollution | Vehicle and factory smoke |
| Water pollution | Chemicals in a river |
| Noise pollution | Loud machines or generators |
Disposing of dirt and waste responsibly means putting it where it will not harm people or the environment — never burning plastic near homes or pouring oil into drains.
Smoke from vehicles and factories mostly causes:
Answer: A. air pollution
Dumping chemicals or rubbish into a river causes:
Answer: B. water pollution
Loud, constant noise from machines or generators is a type of:
Answer: C. noise pollution
Which of these helps prevent pollution?
Answer: D. Disposing of waste properly instead of dumping it anywhere
Disposing of dirt and waste responsibly means:
Answer: A. putting it where it will not harm people or the environment
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