Pollution, wetlands and ecosystems

Kinds of pollution, wetlands, ecosystems and what you can do. Read one part at a time and tap “I know this”. Then test yourself in the quiz.

Know it already? Jump straight to the quiz

Your progress0 of 2

Pollution

Kind	Example	Effect
Air	Factory smoke, exhaust fumes	Breathing problems
Water	Litter, sewage and chemicals in rivers and the sea	People who drink or swim in dirty water can get diarrhoea and diseases such as cholera; animals eat plastic or get tangled
Land (soil)	Harmful substances that end up in the ground	Plants and animals are poisoned
Noise	Sound loud enough to cause harm	Hearing damage, stress

Litter in the street washes into storm drains, rivers and the sea. Rubbish heaps attract rats and flies that carry germs and spread disease. Put litter in a bin, make less waste and recycle glass, paper, plastic and tins.

Tap when you could tell someone without looking.

Wetlands and ecosystems

Not all wetlands are always marshy; some are only wet in certain seasons.
Vegetation is all the plants growing in an area.
Draining a wetland to build houses damages it.
Trees give oxygen and trap pollution. Water is precious in our dry country.

Tap when you could tell someone without looking.

Remember this and test yourself

Remember this: your summary

Four kinds of pollution: air, water, land (soil) and noise.
Factories must safely get rid of their own industrial waste; some chemicals are poisonous.
A wetland is land that is wet or under shallow water; it cleans water and is home to birds, frogs and fish.
An ecosystem: living things and their surroundings. If one part disappears, the whole is disrupted.
The Ramsar Convention protects wetlands worldwide.

Write these points in your book. Read them again the night before the test.

Memory trick

Four pollutions: A-W-L-N — Air, Water, Land, Noise.

Flash cards · Tap to turn over

Important words

First say what the word means, then turn the card over.

Test yourself · Part 2

True or false?

Read the question and the answer. Is the answer right? Tap True or False.

Now the real quiz!

The quiz has many more questions on this topic. Every question shows straight away whether you are right and explains why.

Take the quiz: Pollution, wetlands and ecosystems

All Grade 4 Life Skills summaries

For parents

Read one part together and ask your child to tell it back in their own words.
The ticks (“I know this”) are saved on this device only. We never ask for names or emails.

Follows CAPS for Grade 4 Life Skills. Always check your teacher’s notes and textbook too.