Year 6 Topic 9 Waste materials

What is the correct definition of waste materials ?

• Materials that are highly valuable and useful.

• Materials that we no longer need and want to keep

• Materials that are in high demand and sought after.

How do you classifying the waste materials ?

• Based on the type of materials

• Based on the lifespan of materials

• Based on the colour of materials

• Based on the shape of materials

What type of waste materials shown in this diagram ?

• Paper

• Toxic waste

• Metal

A group of waste materials that can be decomposed by microorganisms.

What is the correct meaning of non-biodegradable waste?

• Waste that can be broken down or decomposed by natural processes.

• Waste that is harmful to the environment.

• Waste that cannot be broken down or decomposed by natural processes.

• Waste that is easily recyclable

Which waste materials are classifying into group biodegradable waste ?

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Which waste materials are NOT the non-biodegradable waste ?

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What are the effects caused by biodegradable and non-biodegradable materials if they are not used wisely?

• Flash floods occur due to clogged drains.

• Human lives are threatened by the disposal of toxic waste.

• The ecosystem maintains balance and supports life.

• Aquatic life faces extinction problems.

​ Environmental pollution such as ​ ______ and ​ ______ will occur if waste materials are not managed wisely.

• air pollution
• water pollution
• light pollution
• sound pollution

Why is it important to manage waste materials properly?

• To encourage the growth of harmful bacteria and pests.

• To increase the amount of landslides.

• To prevent environmental pollution and promote sustainability.

• To save money on waste disposal.