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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:

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

Ans 2:

Prachi Chauhan from Rbk global, Thane
Class : Class 10

Ans 3:

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

Ans 4:

Anoushka Chhauda from Sanskriti, Pune
Class : Class 8

Ans 5:

SJ HARITHA from PSBS, BENGALURU
Class : Class 8
a

Ans 6:

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 7:

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

Ans 8:

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

Ans 9:

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

Ans 10:

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

Ans 11:

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

Ans 12:

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

Ans 13:

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

Ans 14:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8

Ans 15:

pranil mishra from KVS, bhubaneswar
Class : Class 8

Ans 16:

Anoushka Chhauda from Sanskriti, Pune
Class : Class 8

Ans 17:

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

Post Your Answer

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

Ans 1:

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.

Ans 2:

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

Ans 3:

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

Ans 4:

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 5:

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 6:

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

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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:

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 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:

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

Ans 4:

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 5:

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

Ans 6:

archit from Chinmaya Vidyalaya, Raibareli
Class : Class 8

Ans 7:

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 8:

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

Ans 9:

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 10:

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 11:

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

Ans 12:

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

Ans 13:

archit from Chinmaya Vidyalaya, Raibareli
Class : Class 8

Ans 14:

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

Ans 15:

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 16:

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

Post Your Answer

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:

Ojaswi from SAINT JOHNS CONVENT SCHOOL LANSDOWNE, DELHI
Class : Class 9
angora wool is obtain by angora rabbit and not angora sheep. Coir is the outer covering of coconut

Ans 3:

UMA Subramanian from Global Indian International School, Singapore
Class : Class 6

Ans 4:

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 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:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 2:

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 3:

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 4:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 5:

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

Ans 6:

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

Ans 7:

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

Ans 8:

Rishit Verma from CMR NPS, Bengaluru
Class : Class 6

Ans 9:

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

Ans 10:

Aahan Jain from ,
Class : Class 1

Ans 11:

Rishit Verma from CMR NPS, Bengaluru
Class : Class 6

Ans 12:

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

Ans 13:

Madhav from Kendriya Vidyalaya Ernakulam, Ernakulam
Class : Class 8

Ans 14:

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

Ans 15:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 16:

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 17:

Rayansh Mishra from VIBGYOR HIGH, Pune
Class : Class 7
there were multiple wrong answers

Post Your Answer

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

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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

Post Your Answer

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

Ans 1:

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

Ans 2:

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.

Post Your Answer

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:

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

Ans 2:

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

Ans 3:

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

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AKSHITA DIXIT from R K SARDA VIDYA MANDIR, RAIPUR
Subject :NSO    Class : Class 6

A few statements about centrifugation method are given :
I. The mixture containing very small suspended particles is rotated at a high speed in a centrifuge machine.
II. The denser particles stay at the top.
III. The method is used to separate water from wet clothes in a washing machine.
IV. The method can be used in laboratories for separating plasma and platelets.
The correct statements are

A I and IV only
B I, II and III only
C II, III and IV only
D I, III and IV only


Ans 1:

Srinwanti from Ekya, bangalore
Class : Class 8

Ans 2:

Atul Sanjeev from Indian School Al Ghubra, Muscat
Class : Class 9
What is centrifugation

Ans 3:

Advait talnikar from Dhruv Global School, Sangamner
Class : Class 6
The answer is A

Ans 4:

SOUMYA SHAMBHAVI JHA from PODAR INTERNATIONAL SCHOOL, MUMBAI
Class : Class 6
centrifugation is a process in which a substance is spun at a very high speed to separate minute particles. For eg. Blood is spun at a high speed to separate particles such as red and white blood cells, plasma platelets, and plasma.

Ans 5:

Anika Saha from New Town School, KOLKATA
Class : Class 6
the answer is A.

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