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Published on: 24/10/2025
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Questions + Answers key
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1.
Suggest any two ways to minimise the harmful effects of plastics.
2.
Why should containers used for storing poisonous substances be recycled separately?
3.
List some differentiating features between composting and vermicomposting.
4.
3R's are used as efficient means to reduce waste. What is meant by three R's in terms of waste disposal?
5.
Do you think, it is better to use compost instead of chemical fertilisers? Why?
6.
How does the packaging increase the amount of garbage?
7.
What food do the redworms eat?
8.
Should the containers used for storing harmful substances be used to make plastic bags?
9.
What could be useful garbage? Why is it thrown away in the first place? Is there some garbage that is not actually garbage?
10.
Name a kind of fuel which is made by decomposition of organic waste.
11.
Precautions should be taken while storing cooked food items in plastic bags. Why?
12.
Municipality provides two types of dustbins for garbage collection. One blue coloured and one green coloured. Among the following wastes provided which, waste will you put in which dustbin?
Plastic materials, metal and glass items, waste of plants and animals, peels of fruits and vegetables, dried leaves and twigs, remains of meat like flesh and bones.
13.
Leaves falling from trees should be disposed by
burning
making compost by boiling and drying them
making compost by vermicomposting
None of the above
14.
Some materials present in waste can rot. This rotting is carried out by
microbes
insects
ants
Amoeba
15.
The three Rs used in connection with reducing waste are
reduce, reuse, recycle
reduce, reserve, recycle
reduce, resell, redeem
revise, resell, reuse
16.
Hospital waste is usually infectious. Select the best way to .dispose them.
Recycled
Incinerated
Composted
17.
Which of the following activities does not reflect responsible behaviour with regard to waste disposal?
Goods carried in paper bags or cloth bags
Waste collected in polythene bags for disposal
Waste separated into those that degrade and those that do not
Making handicrafts with used up notebooks
18.
Plastic wastes ____________ are as they do not _____________.
19.
Method of making compost using _______________ is called vermicomposting.
20.
We need to generate __________waste.
21.
Converting plant and animal wastes into manure is called __________
22.
____________ is an area where the garbage is collected.
23.
Plastics give out harmful gases upon heating or burning.
24.
Redworms eat upon grasses, leaves and make it compost.
25.
Drains get choked by plastics thrown by us.
26.
Plastics are ecofriendly
27.
All components of garbage can be converted into compost.
1.
The two ways to minimise the harmful effects of plastics are
(i) Reuse of plastic bags and containers will minimise the number Of plastic bags.
(ii) Avoid burning of plastics as they release harmful gases in the atmosphere.
Correct the definitions of certain terms given below by changing only one word.
(a) Compost Substances converted into manure for use in industries.
(b) Landfill Garbage buried under water in an area.
(c) Recycling Reuse of unused material in the same or another form.
2.
Containers used: Hor storing poisonous substances contain residues of chemicals in them.
These containers will contaminate other recycling substances thereby, making every product recycled in them harmful.
3.
Composting It is a natural process by which biodegradable waste like leaves can be turned into manures by the use of microbes only.
Vermicomposting In this process, manure is formed from the waste by use of redworms along with the microbes.
4.
It means reduce the waste generation, reuse the substances which can be used again and recycle the materials which are non-biodegradable and cannot be reused.
5.
Yes, it is better to use compost instead of chemical fertilisers. The reasons are as follows:
(i) Compost is ecofriendly, while chemical fertilisers destroy the natural composition of soil by adding unwanted chemicals into the soil.
(ii) Production of compost is easy and harmless whereas production of chemical fertilisers is a costly process.
(iii) Chemical fertilisers cannot be decomposed by natural methods hence, create pollution of soil and water.
6.
Plastic bags, cans, aluminium foils, and many other package materials are used and thrown after use as garbage. Things like ghee, oils, soaps, cereals, snacks, even vegetables are available in smaller packets in which a lot of packaging material is used.
7.
They eat food items like fruit and vegetable wastes, tea and coffee remains and weeds from the garbage.
8.
No, the containers used for storing harmful substances should not be used to make plastic bags because plastic bags are used to carry grocery items which may be contaminated.
9.
The useful garbage could be the peels of fruits and vegetables, leftover cooked food and fallen leaves of trees. It is thrown away in the first place because its primary use was complete. Some garbage is not actually garbage because it can be converted into compost which is used as fertiliser.
10.
We get biogas which is made from animal waste. We have to set up such plants to generate biogas. It is ecofriendly and best way to manage animal waste.
11.
Plastic bags are not considered suitable for storing cooked food because
(i) these bags may have been used earlier for some other purposes. The residue left behind can be harmful.
(ii) food can mix with chemicals present in plastic bags.
(iii) sometimes bags collected by rag pickers are washed and used which is not a healthy practice.
(iv) plastic bags are not recommended for recycle and reuse as it can harm our health.
12.
The above mentioned wastes can be categorised into two categories:
(i) Green bins Wastes which can be decomposed is put in green dustbins, e.g. plants and animals waste, peels of vegetables and fruits, dried leaves, twigs, remains of meat like flesh and bones.
(ii) Blue bins Wastes which cannot be decomposed but can be recycled is put in blue dustbins, e.g. plastic materials, glass, metals, etc.
13.
(c)
making compost by vermicomposting
14.
(a)
microbes
15.
(a)
reduce, reuse, recycle
16.
(b)
Incinerated
17.
(b)
Waste collected in polythene bags for disposal
18.
( )
non-biodegradable, decompose
19.
( )
redworms
20.
( )
less
21.
( )
composting
22.
( )
Landfill
23.
(a)
24.
(a)
25.
(a)
26.
(b)
27.
(b)
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