Waste Management

Grade 8 Science — Waste Management: 25 practice questions with instant scoring and explanations.

1. Which of the following is an example of biodegradable waste?
2. Non-biodegradable waste includes:
3. What is the time period for complete decomposition of plastic waste in nature?
4. Composting is a process of:
5. Which microorganism is primarily responsible for the decomposition in composting?
6. Vermicomposting uses which organism to decompose organic waste?
7. The main advantage of vermicomposting over traditional composting is:
8. Incineration of waste means:
9. What is a disadvantage of incineration as a waste disposal method?
10. A landfill is an area where:
11. Which of the following is a concern with landfills?
12. E-waste (electronic waste) includes:
13. Why is e-waste considered hazardous?
14. The 3R principle in waste management stands for:
15. Which of the following follows the 'Reduce' principle?
16. The 5R principle extends the 3R by adding:
17. Sewage treatment involves multiple stages. The primary treatment stage involves:
18. In sewage treatment, secondary treatment primarily focuses on:
19. Tertiary treatment of sewage removes:
20. The sludge formed during sewage treatment can be:
21. Which of the following is a method to reduce household waste?
22. Biomedical waste should be handled by:
23. Recycling of plastic benefits the environment by:
24. Which waste material is easiest to recycle?
25. The main goal of waste management is to: