50 questions · timed · auto-graded
They do not have teeth to grind their food.
Biodegradable wastes or organic wastes cannot be recycled.
The product $'X'$ is paper. Paper is biodegradable, useful and can be recycled into paper once again. On the contrary, glass, metals and plastics are man-made products and cannot be decomposed easily.
Waste collected in polythene bags for disposal does not reflect responsible behaviour.
This is because polythene bags are non-biodegradable. They do not decompose in nature on their own and are eaten up along with garbage food by cattle, thus causing harm to them.
In the given figures $P, Q$ and $T$ are biodegradable substances.
Plastic bottles and metal cans can be reused by storing water at home.
Red color bin.
The vermicompost is prepared by using red-worms.
Making compost from kitchen garbage using redworm is called vermicomposting.
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S.No.
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Column$-I$
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S.No.
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Column$-II$
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$A.$
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Food for red worms.
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$(p)$
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Tea, coffee
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$B$.
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Gizzard
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$(q)$
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Structure used by red worm for grinding their food
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$C.$
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Paper mache
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$(r)$
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Paste made of paper and clay
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$D.$
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Plastics
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$(s)$
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When heated give out harmful gases.
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Biodegradable waste is used as manure.
When we add pickles, milk preparations, meat, oil, vinegar and tea remains to waste pits, it leads to the production of disease - causing microorganisms.
Dry leaves and rotten vegetables should be converted to compost. Compost is a natural fertilizer produced by the decomposition of organic waste from kitchen, farms, vegetable etc.
Plastic bags and news papers can be recycled.
$2 \times 10 = 20$ years.
Practicing $3R’s$ (Reduce, Reuse and Recycle) is a good method of waste management and important for healthy environment.
Garbage from cities is collected at landfill areas.
No, burning of dry leaves produces smoke and harmful gases which are injurious to our health.
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A broken egg shell.
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Pencil shavings.
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Dry leaves.
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Plastic carry bags.
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Fruit vegetable peels.
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Plastic carry bags are non-biodegradable wastes. Hence they should be reduced by regarding.
Vermicomposting is a method of preparing compost with the help of earthworms. It is an excellent method of getting the best out of waste and also save a lot of money that is spent on buying expensive chemical fertilisers and manure from the market.
Non-biodegradable wastes are those that cannot be broke and harmless products by microbes.
The wastes that are derived from the living matter are biodegradable wastes.
Vegetable wastes are plant products. Therefore, these are biodegradable and can be decomposed easily. On the contrary, man-made products such as plastic and metals take very long time to decompose. Hence they are non-biodegradable.
Organic wastes from kitchen and animal excreta are used for producing biogas.
Bread is a biodegradable material.
The given sign is labeled on some products to show that they can be recycled and reused.