9.0 WASTE MATERIALS 6 DEDIKASI

What is the meaning of biodegradable materials?

• Waste materials that can be decay over a long period of time.

• Waste materials that cannot be decomposed by microorganisms.

• Waste materials that can be decomposed by microorganisms.

This materials is needed by human to grow and produce energy. It becomes spoilt easily and cannot last long. It smell bad when spoiled and decomposed by the action of microorganisms.

What is the class of waste materials meant in the statement above?

• Biodegradable waste

• Non-biodegradable waste

• Food waste

• Faeces

Which of the following is a non-biodegradable waste?

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• 
• 
• 

The diagram shows a factory releasing liquid waste into the river.

What will happen if this activity is not controlled?

• Acid rain

• Haze

  Jerebu

• Aquatic organisms will die

• Respiratory problems will increase

The food waste should be disposed in a proper way instead of throwing it into the river.

From the statement above, how do biodegradable materials harm the aquatic lives?

• Environmental pollution such as water pollution and air pollution will occur.

• Aquatic lives die from eating plastic that are thrown into the oceans.

• Human lives become threatend by the disposal of toxic waste.

• Aquatic lives die due to lack of oxygen.