NCERT Exemplar Problem Class 6 Science Garbage in Garbage out Solution Chapter 16 Full Explanation. NCERT Exemplar Class 6 Science – Chapter 16 Garbage in Garbage out. Exemplar Problem Class 6 Science Garbage in Garbage out Solution by Science Experts.
NCERT Exemplar Problem Class 6 Science Garbage in Garbage out Solution
• Multiple Choice Questions
1) The method of preparing compost with the help of earthworms is called
a) Composting
b) Vermicomposting
c) Manuring
d) Decomposing
Answer:- b) Vermicomposting
The compost which is made with Earthworms is known as vermicompost and the method to prepare it is known as Vermicomposting.
2) If you dump kitchen waste in a pit, it may, after sometime
a) Convert into compost.
b) Convert into vermicompost
c) Remains as much.
d) Remain forever in its dried form.
Answer:- a) Convert into Compost.
Dumping kitchen waste into pit after some time convert into compost due to action of microorganisms.
3) Which of the following activities does not reflect responsible behaviour with regard to waste disposal?
a) Goods carried in paper bags or cloth bags.
b) Waste collected in polythene bags for disposal.
c) Waste separated into those that degrade and those that do not.
d) Making handicrafts with used up notebooks.
Answer:- b) Waste collected in polythene bags for disposal.
Polythene bags are non degradable and it waste collected in polythene bags may smell foul after few days.
4) 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 materials to obtain manure at low cost is lost.
iv) lot of heat is generated.
The correct reasons of why we should not burn leaves are
a) I, ii and iv only
b) I, ii, iii, and iv
c) Ii and iii only
d) Ii, iii, and iv only
Answer:- b) I, ii, iii and iv
All of the above given reasons are responsible for the ill effects causing after burning of dried leaves.
5) A garbage collector separate 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) Newspapers and journals
III) Screw and nuts
IV) Vegetable peels
V) Metal chips
VI) Egg shells
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 |
- C) option is correct and shows the correct match for the disposal of the waste.
6) 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?
a) II, I, III, IV
b) I, II, III, IV
c) II, IV, I, III
d) IV, I, II, III
Answer:- a) II, I, III, IV
The correct sequence of the formation of compost from the kitchen waste at home should be
Covering of bottom of the pit with sand
Put kitchen waste garbage into the pit
Cover pit loosely
Add worms to it.
- Very Short Answer Questions
7) Read the items mentioned in column I and II and fill in the related process in the column III.
Column I
|
Column II | Column III |
a) Organic waste
|
Earthworms | i)________ |
b) Garbage
|
Dig pit and fill with garbage
|
ii)________ |
c) Old newspaper
|
Paper bags | iii)_______ |
Answer:-
Column I | Column II | Column III |
a) Organic waste | Earthworms | Vermi-composting |
b) Garbage | Dig pit and fill with garbage | Garbage disposal/ landfill |
c) Old Newspaper | Paper bags | Recycling |
8) Correct the definitions of certain terms given below by changing only one word.
i) Compost: substances converted into manure for use in industries.
Answer:- Compost : substances converted into manure for use in agricultural farms.
ii) Landfill: Garbage buried under water in an area.
Answer:- Landfill: Garbage buried under soil in an area.
iii) Recycling : Reuse of unused material in the same or another form.
Answer:- Recycling : Reuse of used material in the same or another form.
9) Provide the suitable term that expresses the meaning of each of the following statements.
a) Greeting cards made from newspaper.
Answer:- Recycling
b) Contents of the waste bins.
Answer:- Garbage
c) Worms converting certain kinds of waste into manure.
Answer:- vermicomposting
d) An area where a lot of garbage is collected, spread out and covered with soil.
Answer:- Landfill
- Short Answer Questions
10) To what use can you put the following kinds of garbage and how?
I) Rotting smelly garbage
Answer:- Rotting smelly garbage can be converted into compost by buried the smelly garbage into soil.
II) dry leaves collected in a garbage
Answer:- dry leaves collected in a garbage can be used as manure.
III) Old newspapers
Answer:- old newspapers can be used by recycling. It can be used to made an paper bags or paper pulp can be used for handcrafts.
11) Paheli was writing a letter to her friend. She crumpled and threw the first draft of her letter on the floor as it had become untidy. Similarly she crumpled and threw 6 more papers on the ground. In the end, she picked them up and put them in a polythene bag and threw it on the road outside her house. Do you think paheli’s action were responsible? What would you have done if you were in her place ?
Answer:- No. papers can be recycled therefore throwing paper in the polythene bags is not right. Used papers can recycled and use as an paper bags. Other thing we can do that used paper’s pulp can be used for making handcrafts.
12) Read the poem written below and then answer the questions from the information gathered from the book or elsewhere.
Blue and Green
Two bins, you mean?
Yes, they are there
To throw your waste.
But not in a hurry
Nor in a haste.
Select from waste, sieve if seems muddy
Separate all items and when they are ready
Place in a blue bin, or one that is green
For a voyage to the landfill, or for composting.
b) For composting
Answer:- compost is used in the agricultural fields as an manure. Compost is made from mostly kitchen waste, and animal dung (cow and buffaloes dung) etc.
13) Beera, a farmer would clear his filed everyday, and burn dry leaves fallen on the ground. After sometime he found that those living in huts near his field were suffering from cough and breathing problems.
i) Can you explain why?
Answer:- from the burning of dry leaves the fumes and gases are goes out in the atmosphere. Which on inhaling causes severe breathing problems like Asthma and cough.
ii) Also suggest an environment friendly way to dispose the dry leaves.
Answer:-burning of dry leaves causes severe disease related to breathing. Therefore dry leaves should not be burned but it can be used as an manure. We should use that in composting.
- Long Answer Questions
14) Put a tick (✓) against the garbage items given in table 16.1 which could be converted into manure. Put a cross (×) against the others.
Answer:-
Garbage Items |
Make Manure or not |
|
i) | Egg shells | ✓ |
ii) | Straw | ✓ |
iii) | Dry flowers | ✓ |
iv) | Pebbles | × |
v) | Broken pieces of glass | × |
vi) | Nails and screws | × |
vii) | Plastic bangles | × |
viii) | Left over food | ✓ |
ix) | Steel broken vessel | × |
x) | Dead animals | ✓ |
15) The pie charts A and B shown in fig. 16.1 are based on waste segregation method adopted by two families X and Y respectively.
Which of the two families X or Y do you think is more environmentally conscious and why?
Answer:-
X family is more environmentally conscious. Because they are disposing their kitchen waste and other garbage like polythene bags, metal, newspaper are separately.
But Y family is disposing the kitchen waste and polythene bags collectively thus these is not right as environmental concerns.
16) Given below are steps in vermicomposting and each step has been given an alphabet. Rearrange the steps in the correct sequence and write the alphabets on the chart provided. One step is done for you.
F Dig a pit in a suitable place in your garden.
C Spread sand on the floor of the pit.
E Add vegetables peels and fruits waste in the pit.
A Sprinkle water to keep it moist.
D place red worms in the pit.
B Cover with a gunny bag or grass.
Answer:-
Step:-
1→F
2→ C
3→E
4→B
5→A
6→D
17) Write 3 sentences on what comes to your mind when you chance to see the following.
A) A rag picker.
Answer:-
1) Removing of garbage from the houses
2) Living maximum time in harmful garbage
3) Poor persons doing the work for money.
B) A cow eating a polythene bag.
Answer:-.
1) Polythene bags will damage them.
2) Polythene bags are not disposed properly.
3) Polythene bags eaten by animals chock their oesophagus and thus may cause death.
C) Foul odour emanating from garbage at the entrance of your house.
Answer:-
1) Unhealthy surrounding and not disposed garbage properly.
2) Dirty sight.
3) Large amount of waste generated at the side of house.
4) Expectations from others to clear the garbage.
18) Beautiful hand crafted articles like boxes and toys are made of paper pulp in our country. Can you explain how paper pulp which is made from paper can be used to make hard boxes and other articles?
Answer:-
1) Tear the used papers in pieces.
2) Put these small pieces in container.
3) Pour water in it.
4) Let these pieces of paper submerged in it for one to two days
5) Make thick paste of that pieces of papers.
6) Now these thick paste is called as pulp.
7) Now these pulp is goes for further process washing, bleaching .
8) After bleaching it can be reused by making paper again, or cardboards, toys and boxes of it.
9) Thus how this process is carried out in factories.
Used papers /newspapers
↓
Pulping
↓
Washing
↓
Bleaching
↓
Paper / cardboard / Toys/ boxes.
19) Recently, a ban on plastic bags has been imposed in many places? Is the ban justified? Give reasons in three sentences.
Answer:-
The ban on the plastic bags is justified,
Plastics are harmful to human health. It cannot be reused or recycled. It cannot also be decomposed and degraded. Therefore the used plastic bags make a huge amount of garbage which causes harmful effects on human health. Also the plastic bags over the road are eaten by animals and these are very dangerous for their health, can cause death also.
Therefore A ban on plastic is justified.
20) Why should we not burn plastic items?
Answer:-
Plastic items are non degradable they do not mix in soil after also a long span of time. But we cannot burn them also because,
- They do not burn easily.
- On burning they spread an dangerous gases into the environment.
- These gases are harmful and causes severe disease.
- Burnt of plastic can be eaten by animals which can cause harm to them.
- Ash of the toxic plastic left over after burning which is also not good for soil.
- It causes soil erosion.
21) What happens when
a) Cooking medium is made to flow down a drain
Answer:- cooking medium if flow through down a drain then it will block the drainage pipes and clog the pores in the soil.
b) Insecticides, motor oil, paints are poured down the drain.
Answer:- Microbes are necessary for the degradation of waste which can be killed by the insecticides, motor oil and paints if poured into the drainage.
c) Tea leaves, cotton swabs and old soft toys are thrown into the drain.
Answer:- these materials can be absorbed water when get contacted with water and thus can block the pipe of drainage.
22) Answer the following questions in one or two words or sentences.
a) Why should we prefer to use paper bags rather than polythene bags?
Answer:- paper bags can be recycled and re-used but polythene bags cannot re-used.
b) Who, out of the following should properly dispose of the garbage –father , mother , elder brother, younger sister ?
Answer:- All the member of the house also all humans should dispose garbage properly.
c) Which one out of beetles, roundworm and earthworm are used for vermicomposting and why?
Answer:- Earthworms, can compost the plants and animals also their products into compost, and thus known as Vermicomposting.
Hope Exemplar Problem Class 6 Science Garbage in Garbage out Solution all Questions’ Explanation will help you!