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Practice each question, then open the answer or worked solution.
The method of preparing compost with the help of earthworms is called
Ans: The correct answer is option (b) vermicomposting. Earthworms are known as farmers’ friends because they improve the quality of the soil. As a result, a process known as vermicomposting was developed to make compost with the help of earthworms. This manure is nutrient-dense.
If you dump kitchen waste in a pit, it may, after sometime
Ans: The correct answer is option (a) convert into compost. Kitchen waste is biodegradable waste.
Which of the following activities does not reflect responsible behaviour with regard to waste disposal?
Ans: The correct answer is option (b) waste collected in polythene bags for disposal is unhealthy, and polythene is non-biodegradable and causes pollution.
Paheli gave the following ill effects of the practice of burning dried leaves and other plant parts
(i) Burning degrades the soil.
(ii) Burning produces harmful gases/fumes.
(iii) Precious raw material to obtain manure at low cost is lost.
(iv) Lot of heat is generated unnecessarily.
The correct reasons of why we should not burn leaves are
Ans: The correct answer is option (b) i, ii, iii, and iv.
A garbage collector separates items mentioned below in the garbage into red, green and blue containers for their transfer to landfill, composting pit, and recycling unit respectively. Items:
(i) Plastic bags
(ii) Newspaper and journals
(iii) Screw and nuts
(iv) Vegetable peels
(v) Metal chips
(vi) Eggshells
Which items were transferred to which bin?
RED | GREEN | BLUE | |
(a) | (i) and (iv) | (ii) and (iii) | (v) and (vi) |
(b) | (i) and (iii) | (ii) and (v) | (iv) and (vi) |
(c) | (i), (iii) and (v) | (iv) and (vi) | (ii) only |
(d) | (i) and (v) | (ii) and (iv) | (iii) only |
Ans: The correct answer is option
(c) | (i), (iii) and (v) | (iv) and (vi) | (ii) only |
Metal chips, screws, and nuts are disposed of in red bins. Biodegradable waste, such as eggshells and vegetable peels, is collected in green bins. The newspapers and journals will be collected in blue bins.
The steps required for conversion of kitchen garbage into manure are given below in a jumbled form.
(i) Put garbage in a pit
(ii) Cover the bottom of the pit with sand
(iii) Cover the pit loosely with a gunny bag or grass
(iv) Add worms
Which of the following shows the correct sequence of the above steps?
Ans: None of the given options are correct. The correct answer would be (ii), (i), (iv), (iii).