MCQ Questions for Class 6 Science: Ch 16 Garbage In, Garbage Out

MCQ Questions for Class 6 Science: Ch 16 Garbage In, Garbage Out

1. How is garbage handled at the landfill site?
(a) It is spread as such over the landfill site
(b) It is separated into useful and non-useful components and then spread over the landfill site
(c) Both the above are correct
(d) None of the above is correct
► (b) It is separated into useful and non-useful components and then spread over the landfill site

2. For red worms the food should be
(a) put at the top layer of soil
(b) put at the bottom (about 30 cm) deep of the pit
(c) put at about 2-3 cm deep inside the pit
(d) All the above are correct
► (c) put at about 2-3 cm deep inside the pit

3. Liquid waste from houses is called
(a) Effluent
(b) Sewage
(c) Sludge
(d) Smog
► (b) Sewage

4. Which kind of materials are to be collected in blue coloured bins?
(a) Plastics
(b) Metals
(c) Glass
(d) Materials that can be used again
► (d) Materials that can be used again

5. By whom is garbage taken away from dust-bins?
(a) By Safai-Karamcharis
(b) By birds and animals
(c) By wind
(d) All of these
► (a) By Safai-Karamcharis

6. Which of the following can not be used for composting?
(a) Plastic bag
(b) Rotten banana
(c) Vegetable peels
(d) Fruits peels
► (a) Plastic bag

7. Example of not a household garbage is
(a) Dal packets
(b) Plants parts
(c) Vegetable peels
(d) Crockery pieces
► (b) Plants parts

8. Polythene and plastics
(a) Are not harmful
(b) Are non-biodegradable and very harmful
(c) Do not generate any bad odour
(d) Degrade in the environment very easily
► (b) Are non-biodegradable and very harmful

9. A non-biodegradable item
(a) Can not be decomposed easily
(b) Can be recycled
(c) Can be exhaustible
(d) Can be reused
► (a) Can not be decomposed easily

10. To reduce plastic waste we should
(a) Bury in the earth
(b) Burn it
(c) Minimize its use
(d) Dump it in sea
► (c) Minimize its use

17. Where do we throw away the garbage from our home?
(a) At a distant place
(b) At our door steps
(c) In dust bins
(d) All of the above
► (c) In dust bins

18. Land fill
(a) is a low lying open area
(b) is a low lying open area, where the garbage collected from a city or town is dumped
(c) is a place where truck loads of garbage are dumped
(d) All of the above are correct
► (b) is a low lying open area, where the garbage collected from a city or town is dumped

19. Biodegradable waste
(a) Does not decompose
(b) Accumulates in environment
(c) Enters the food chains then causes bio magnification
(d) Decomposes in nature by microbes
► (d) Decomposes in nature by microbes

20. Which of the following is used as composting raw material?
(a) Old clothes
(b) Kitchen wastes
(c) Animals wastes only
(d) Human excreta
► (b) Kitchen wastes

21. An example of source reduction of waste is
(a) Making paper aero planes
(b) Burning
(c) Throwing things that are old
(d) Backward composting
► (d) Backward composting

22. Which one is not an organic waste?
(a) DDT
(b) Cotton cloths
(c) Vegetable peels
(d) Paper
► (a) DDT

23. Waste management is necessary to protect
(a) Environment
(b) Habitat
(c) Nature
(d) Ecosystem
► (a) Environment

24. Bio gas can be produced by using
(a) Used wooden
(b) Old clothes
(c) Used plastics
(d) Animals excreta
► (d) Animals excreta

25. What kind of materials are to be collected in green coloured bins?
(a) Kitchen waste
(b) Plant waste
(c) Animal waste
(d) Those materials that rot completely when buried in soil
► (d) Those materials that rot completely when buried in soil

26. The area where garbage is collected and decomposed is called
(a) Compost
(b) Landfills
(c) Dustbin
(d) All of these
► (b) Landfills

27. Which one is a good habit
(a) Throwing garbage into drain
(b) Carrying a cloth bag for vegetable
(c) Using scooter for short distance
(d) Using plastic bag
► (b) Carrying a cloth bag for vegetable

28. Bacteria that decompose organic wastes are called
(a) Anaerobic bacteria
(b) Lactobacillus bacteria
(c) Aerobic bacteria
(d) All of these
► (a) Anaerobic bacteria
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