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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

View All Answers (18)

Ans 1:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum

Class : Class 7

Cotton is the cheapest right??

Ans 2:

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 3:

SOUMYA SHAMBHAVI JHA from PODAR INTERNATIONAL SCHOOL, MUMBAI

Class : Class 6

Jute is the cheapest natural fibre,not cotton!

Ans 4:

archit from Chinmaya Vidyalaya, Raibareli

Class : Class 8

Ans 5:

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 6:

Ashwak from Cambridge, Jalandhar

Class : Class 9

Flax is obtained from stem and jute is the cheapest natural fibre . So , the answer is D

Ans 7:

Shourya Ganesh from The Green Acres Academy, Mumbai

Class : Class 9

Answer is d

Ans 8:

Ahamed Shayaan from Sree Gokulam public school , Calicut

Class : Class 7

Ans 9:

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 10:

Ritvik Nainawatee from Freedom International School, BANGALORE

Class : Class 6

Ans 11:

archit from Chinmaya Vidyalaya, Raibareli

Class : Class 8

Ans 12:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum

Class : Class 7

The answer is b right?

Ans 13:

Apeksha Singh from Cambridge School , Noida

Class : Class 3

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 14:

SOUMYA SHAMBHAVI JHA from PODAR INTERNATIONAL SCHOOL, MUMBAI

Class : Class 6

The answer is not b

Ans 15:

Sof Team from Sof Olympiad Trainer Helpdesk, Bangalore

Class : Class 7

cotton' is the cheapest natural fibre

Ans 16:

Aadvik saini from Mvn sector 17, Faridabad

Class : Class 8

Ans 17:

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 18:

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?

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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

View All Answers (6)

Ans 1:

Aadhira from velammal new gen school, Medavakkam, Chennai

Class : Class 6

The 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:

Anushka Srivastava from Cjm, Dehradun

Class : Class 7

Ans 4:

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 5:

Saanvi from rvk, bengaluru

Class : Class 9

correct answer is a

Ans 6:

UMA Subramanian from Global Indian International School, Singapore

Class : Class 7

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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.

View All Answers (17)

Ans 1:

Saipriya from Sankara, Chennai

Class : Class 9

Bengluru poor science schools

Ans 2:

Dushyant Singh from Shree Ram Centenial School, Indore

Class : Class 9

Ans 3:

Aahan Jain from ,

Class : Class 1

Ans 4:

Rishit Verma from CMR NPS, Bengaluru

Class : Class 6

Ans 5:

Kanishk Mukherjee from BDM International, Kolkata

Class : Class 6

Ans 6:

Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune

Class : Class 10

there were multiple wrong answers

Ans 7:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee

Class : Class 10

Ans 8:

Saipriya from Sankara, Chennai

Class : Class 9

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 9:

Madhav from Kendriya Vidyalaya Ernakulam, Ernakulam

Class : Class 8

Ans 10:

Rishit Verma from CMR NPS, Bengaluru

Class : Class 6

Ans 11:

Dushyant Singh from Shree Ram Centenial School, Indore

Class : Class 9

Ans 12:

Kanishk Mukherjee from BDM International, Kolkata

Class : Class 6

cotton fibre is obtained from the fruit of the cotton plant

Ans 13:

Kanishk Mukherjee from BDM International, Kolkata

Class : Class 6

Ans 14:

Darsh Singh from The Deens Academy, Bengaluru

Class : Class 6

Ans 15:

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 16:

Kanishk Mukherjee from BDM International, Kolkata

Class : Class 6

Ans 17:

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!

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prarthana nath from Gundecha education academy, Mumbai

Subject :NSO Class : Class 3

The shape of the Moon seems to be changing. What shape of the Moon is expected to appear when:
a. The Moon is between the Earth and the Sun?
b. The side of the Moon facing the Earth is fully illuminated by the Sun?

----------a-----------------b

please give me logic of ans A.I THINK ITS B.

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Ans 1:

Anagh Agrawal from Billabong high, JABALPUR

Class : Class 3

Yessssss

Ans 2:

Santina Suzanne from owis, bangalore

Class : Class 4

it is very hard

Ans 3:

Riddhiman Bose from Don Bosco School, Kolkata

Class : Class 5

yessssssssssssssssss

Ans 4:

Darshini Chakravarty from Pinnacle High International School, Mumbai

Class : Class 4

Ans 5:

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

Naziya poured 100 mL of boiling water into 4 containers of similar size and material from one to another in the order of a, b, c and d as shown here. Which containers have highest and lowest temperature, respectively?

A d and c
B d and b
C a and d
D a and b

I don't understand.

View All Answers (2)

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

Some water falling on ground, forms an extremely thin, tightly held film around the soil particles called ________ while some water moves down upto the water table and is called ________.
Select the option that correctly fills the blanks in the above statement.

A Gravitational water, capillary water
B Hygroscopic water, surface runoff
C Hygroscopic water, gravitational water
D Capillary water, surface runoff

View All Answers (1)

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

View All Answers (3)

Ans 1:

Shalin Jain from NKDAV Sidheegram, Sidheegram

Class : Class 9

Option A

Ans 2:

SAKSHI KOTHARI from NAVRACHNA SCHOOL SAMA, Vadodara

Class : Class 7

Ans 3:

Shrestha Dutta from Julien Day School, KALYANI

Class : Class 10

opt c is correct

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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

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Ans 1:

Anika Saha from New Town School, KOLKATA

Class : Class 6

the answer is A.

Ans 2:

Srinwanti from Ekya, bangalore

Class : Class 8

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:

Atul Sanjeev from Indian School Al Ghubra, Muscat

Class : Class 9

What is centrifugation

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Shridhar from G G International school, Pune

Subject :NSO Class : Class 3

Which of the following letters belongs to the given figure?

A
B
C
D

how the answer c

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Ans 1:

Punita Ghosh from Billabong High International School, mumbai

Class : Class 5

c as it is facing opposite side

Ans 2:

nandini from father agnel school, Noida

Class : Class 7

becase in the figure all the letters seem to be in the opposite direction while options a b and d are not showing them in th opposite direction and option c is showing