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Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

gaurav from bright angle public school, delhi
Class : Class 6

Ans 2:

Aarathy Sudhir Aarav Sudhir from Global Indian International School, Abu Dhabi
Class : Class 6

Ans 3:

SOUVAGYA SAHA from De Nobili School, DHANBAD
Class : Class 9

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Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Match column I with column II and select the correct option from codes given below.

Column I Column II
(i) Ginning
(A) Cleaning and disentangling the fibres
(ii) Combing
(B) Brushing and straightening of fibres
(iii) Carding
(C) Bolls
(iv) Seed pods
(D) Cotton fibres after being separated from seeds
(v) Lint
(E) Separating fibres from seed


A(i) - (e); (ii) - (b); (iii) - (a); (iv) - (c); (v) - (d)
B(i) - (d); (ii) - (e); (iii) - (b); (iv) - (a); (v) - (c)
C(i) - (e); (ii) - (a); (iii) - (b); (iv) - (c); (v) - (d)
D(i) - (d); (ii) - (a); (iii) - (b); (iv) - (c); (v) - (e)


Ans 1:

Anoushka Chhauda from Sanskriti, Pune
Class : Class 8

Ans 2:

SJ HARITHA from PSNLO, BENGALURU
Class : Class 10
a

Ans 3:

Aarav Gupta from Mondrian House, DEHRADUN
Class : Class 7
A

Ans 4:

Anoushka Chhauda from Sanskriti, Pune
Class : Class 8

Ans 5:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9

Ans 6:

Valli Rams from Blossom Public School, Thanjavur
Class : Class 10
A

Ans 7:

Vibhav from Learning Paths School, Mohali
Class : Class 7
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Ans 8:

Sidharth Maheshwari from Pathways School Gurgaon, Gurugaon
Class : Class 6
a

Ans 9:

HIMANISH BASU from APS BANGALORE , Bangalore
Class : Class 7
A

Ans 10:

PAYAL from DPS BHILAI, BHILAI
Class : Class 8
very important question .the main fanda is to understand the question/words. the answer is option A

Ans 11:

Manvi Mundepi from Montfort School Roorkee, Roorkee
Class : Class 9

Ans 12:

Valli Rams from Blossom Public School, Thanjavur
Class : Class 10
A

Ans 13:

pranil mishra from KVS, bhubaneswar
Class : Class 8

Ans 14:

Kartik Chauhan from Euro school , Pune
Class : Class 7

Ans 15:

Saanvi from rvk, bengaluru
Class : Class 9
the correct answer is a

Ans 16:

NILARKA PAHARI from Young Horizons School, KOLKATA
Class : Class 6
very confusing question. Answer is option a.

Ans 17:

pradeep718 from DPS Internation, Singapore
Class : Class 2
Answer : A

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Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

Ritvik Nainawatee from Freedom International School, BANGALORE
Class : Class 6
Answer should be (c). Flax is obtained from stem of flax stem and wool is obtained without harming the sheep

Ans 2:

Apeksha Singh from Cambridge School , Noida
Class : Class 6
Answer is option - (C)

Ans 3:

Amara Bhatia from HFSI, Mumbai
Class : Class 7
answer should be [d] since Jute comes from the stem of the jute plant and wool is sheared from sheeps etc. without harming the animal.

Ans 4:

SAMRA BISWAS from KENDRIYA VIDYALAYA BARRACKPORE AIRFORCE, BARRACKPORE
Class : Class 9
Answer should be C ......

Ans 5:

Sarvesh I from Chennai Public School, Chennai
Class : Class 6
ANS is (a)and(c)Flax is obtained from plant stemSilk is obtained by harming silkworm

Ans 6:

Sujal Satish Motagi from AJ Public School, Bengaluru
Class : Class 9
Answer is (c). Because flax is used to make linen which is obtained from flax stem. Wool is made from sheep's hair without harming it.

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Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Select the option that correctly fills the blanks in the given sentences.
(A) (i) of a flax plant provides fibres.
(B) (ii) is the cheapest natural fibre.
(C) The process of separating cotton fibres from cotton seeds is called (iii).
(D) (iv) is obtained by spinning together a bunch of fibres.
(E) (v) is a blended fabric.
(F) The loose fluffy fibres are untangled and combed to form a long soft rope called a (vi).

(i) (ii) (iii) (iv) (v) (vi)
A Seed Jute Retting Yarn Terry-cot Sliver
B Stem Cotton Retting Yarn Terry-cot Sliver
C Seed Cotton Ginning Yarn Terry-cot Sliver
D Stem Jute Ginning Yarn Terry-cot Sliver


Ans 1:

SOUMYA SHAMBHAVI JHA from PODAR INTERNATIONAL SCHOOL, MUMBAI
Class : Class 6
Jute is the cheapest natural fibre,not cotton!

Ans 2:

Apeksha Singh from Cambridge School , Noida
Class : Class 6
The Answer is option D because Jute is known as the golden fibre and the process mentioned in the question is known as ginning

Ans 3:

archit from Chinmaya Vidyalaya, Raibareli
Class : Class 8

Ans 4:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8

Ans 5:

Ahamed Shayaan from Sree Gokulam public school , Calicut
Class : Class 5

Ans 6:

amogh from DELHI PUBLIC SCHOOL NOIDA, Ghaziabad
Class : Class 6
The correct answer is (D) as jute is the cheapest fibre . and stem of the flax plant provides fibres

Ans 7:

Aditya Kaushal from Delhi Public School Ruby Park , Kolkata
Class : Class 7
I think that cotton is the cheapest natural material , not jute and so does a sof help desk employee

Ans 8:

Sof Team from Sof Olympiad Trainer Helpdesk, Bangalore
Class : Class 8
cotton' is the cheapest natural fibre

Ans 9:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
Answer is d

Ans 10:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Class : Class 7
Cotton is the cheapest right??

Ans 11:

Ritvik Nainawatee from Freedom International School, BANGALORE
Class : Class 6

Ans 12:

Utkarsh Chakravarty from Pinnacle High International School, Mumbai
Class : Class 6
i did c because they are from seeds too but most are stems so d

Ans 13:

Ashwak from Cambridge, Jalandhar
Class : Class 8
Flax is obtained from stem and jute is the cheapest natural fibre . So , the answer is D

Ans 14:

archit from Chinmaya Vidyalaya, Raibareli
Class : Class 8

Ans 15:

Mrityunjay from Heritage International Xperiential School, Gurugram
Class : Class 8
I think Cotton is the cheapest fibre and someone from SOF help desk also says the same and the process of seperating cotton from cotton seeds is called Ginning only

Ans 16:

B HARI PAVAN from BHAVAN'S ARR SCHOOL, HYDERABAD
Class : Class 6
I think cotton is the cheapest, but the answer says jute is cheapest. So which is right C or D?

Ans 17:

SOUMYA SHAMBHAVI JHA from PODAR INTERNATIONAL SCHOOL, MUMBAI
Class : Class 6
The answer is not b

Ans 18:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Class : Class 7
The answer is b right?

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Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Consider the following statements (i - iv) and select the option that correctly identifies true (T) and false (F) ones.
(i) Angora wool is obtained from Angora sheep.
(ii) Spinning is the process of changing fibre into yarn.
(iii) Coir is obtained from fruits of Kapok tree.
(iv) The process of removing hair from the sheep is called shearing.
(v) Knitting can be done by using only one yarn.

(i) (ii) (iii) (iv) (v)
A F T F T T
B T F F T T
C F F T T T
D F F F T T


Ans 1:

Saanvi from rvk, bengaluru
Class : Class 9
correct answer is a

Ans 2:

Jahnvi Bajpai from Vibgyor High, Banagalore
Class : Class 6
angora wool is obtain by angora rabbit and not angora sheep. Coir is obtained by the husk of a coconut

Ans 3:

Ojaswi from SAINT JOHNS CONVENT SCHOOL LANSDOWNE, DELHI
Class : Class 6
angora wool is obtain by angora rabbit and not angora sheep. Coir is the outer covering of coconut

Ans 4:

UMA Subramanian from Global Indian International School, Singapore
Class : Class 7

Ans 5:

Anushka Srivastava from Cjm, Dehradun
Class : Class 7

Ans 6:

Aadhira from velammal new gen school, Medavakkam, Chennai
Class : Class 6
The correct answer is (A)

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Rishit Verma from CMR NPS, Bengaluru
Subject :NSO    Class : Class 6

Refer to the given flow chart and select the incorrect option regarding P, Q, R and S.


A P is a protein fibre whereas Q, R and S are cellulosic fibres.
B Retting is involved in processing of Q whereas ginning is involved in processing of S.
C P could be wool, Q could be jute, R could be sisal and S could be cotton.
D Fabrics made from P and S are excellent winter clothings whereas fabrics made from Q and R form excellent summer clothings.


Ans 1:

Kashvi Rawat from Gear Innovative International School, Bengaluru
Class : Class 3
Cotton is not obtained from seed of plant so cotton can not be S!

Ans 2:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 3:

Madhav from Kendriya Vidyalaya Ernakulam, Ernakulam
Class : Class 8

Ans 4:

Krithi Manasvini from Alwin Memorial Public School, Chennai
Class : Class 7
The correct Ans is D because In the given flow chart, P is an animal fibre like wool or silk. Q could be jute, flax or hemp. R is sisal and S is cotton. Wool is used in winter clothing while cotton is used for summer clothing. Plant stem fibres like jute, flax, hemp are generally used for making bags, ropes, carpets, etc. Sisal which is a leaf fibre is also used for almost same purposes.

Ans 5:

Saipriya from Sankara, Chennai
Class : Class 8
how can wool/silk and cotton be excellent winter clothing. WOrst option. And Nishka Rawat - Fibres from cotton are obtained from seeds. WOrst science readers................. Worst option too for Sof trainer

Ans 6:

Dushyant Singh from Shree Ram Centenial School, Indore
Class : Class 9
d

Ans 7:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6
cotton fibre is obtained from the fruit of the cotton plant

Ans 8:

Rishit Verma from CMR NPS, Bengaluru
Class : Class 6

Ans 9:

Rishit Verma from CMR NPS, Bengaluru
Class : Class 6

Ans 10:

Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune
Class : Class 8
there were multiple wrong answers

Ans 11:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 12:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 13:

Darsh Singh from The Deens Academy, Bengaluru
Class : Class 6

Ans 14:

Aahan Jain from ,
Class : Class 1

Ans 15:

Dushyant Singh from Shree Ram Centenial School, Indore
Class : Class 9

Ans 16:

Saipriya from Sankara, Chennai
Class : Class 8
Bengluru poor science schools

Ans 17:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 10

Post Your Answer

prarthana nath from Gundecha education academy, Mumbai
Subject :NSO    Class : Class 3

Ans 1:

Darshini Chakravarty from Pinnacle High International School, Mumbai
Class : Class 4

Ans 2:

Anagh Agrawal from Billabong high, JABALPUR
Class : Class 3
Yessssss

Ans 3:

Riddhiman Bose from Don Bosco School, Kolkata
Class : Class 5
yessssssssssssssssss

Ans 4:

Arjun Gourineni from CHIREC International School, Hyderabad
Class : Class 7
Yesssssssssssss

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Kavitharini Joseph from HUS, Chennai
Subject :NSO    Class : Class 4

Ans 1:

Aamena Shahid Ansari from St. Xavier's high school, Vapi, Gujarat
Class : Class 4
The answer is option “c”. see it was boiling water, she poured first into container “a” so it will be having the highest temperature than she poured to container b than to c and finally to container d so during this experiment the boiling water goes to lowest temperature and the last container was container d . So container a will be having the highest temperature and container d will be having the lowest temperature.

Ans 2:

Sashriti Das from Delhi Public School Bangalore North, Bangalore
Class : Class 5
Thanks Aamena

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Garima shokeen from N K Bagrodia Public School, New Delhi
Subject :NSO    Class : Class 9

Ans 1:

Shalin Jain from NKDAV Sidheegram, Sidheegram
Class : Class 9
Option D

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Garima shokeen from N K Bagrodia Public School, New Delhi
Subject :NSO    Class : Class 9

Refer to the given key and answer the following questions.
(i) Membrane with definite pores - P
(ii) Inner membrane with stalked particles - Q
(iii) Inner membrane connected into stacks like structures - R
(iv) Sac like organelle containing hydrolytic enzymes - S
(v) Membraneless organelle composed of one large and one small subunit. - T Select the option that correctly identifies any of these organelles.

A P - Nucleus, Q - Mitochondrion, S - Ribosome
B Q - Chloroplast, R - Mitochondrion, T - Ribosome
C R - Chloroplast, S - Lysosome, T - Ribosome
D P - Nucleus, Q - Chloroplast, R - Mitochondrion


Ans 1:

Shalin Jain from NKDAV Sidheegram, Sidheegram
Class : Class 9
Option A

Ans 2:

Shrestha Dutta from Julien Day School, KALYANI
Class : Class 10
opt c is correct

Ans 3:

SAKSHI KOTHARI from NAVRACHNA SCHOOL SAMA, Vadodara
Class : Class 7
a

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