National Science Olympiad Forum By SOF Olympiad Trainer
  1. Home
  2. Forum

User Forum

Ask Your Question
Kavitha Sun from sanjivani international school, Mumbai
Subject :NSO    Class : Class 3

Ans 1:

Ananya from birla school, Kalyan
Class : Class 3
C

Post Your Answer

HARSHAL KUTE from cambridge school buldhana, Buldhana
Subject :NSO    Class : Class 6

Refer to the given dichotomous key and select the incorrect statement regarding P, Q, R, S and T.

(i) (A) It is a natural fibre.- Go to (ii)
(B) It is a man-made fibre. -
(ii) (A) Fibre is obtained from plants.
- Go to (iii)
(B) Fibre is obtained from animals.
- Go to (iv)
(iii) (A) Fibre obtained from stem. -
(B) Fibre obtained from seed. -
(iv) (A) Fibre obtained by harming source organism. -
(B) Fibre obtained without harming source organism. -

A Fibre P is quick burning and shrinks away from flame giving slightly sweet chemical odour.
B Q could be obtained from Corchorus capsularis while R could be obtained from Gossypium hirsutum.
C Fibre S is obtained from an insect whereas fibre T is obtained from a mammal.
D Fabric made of S can be worn in all seasons whereas fibre Q can be used to make a raincoat.


Can't silk worn in all seasons???????????

Ans 1:

Ayush sharma from GEMS international school , Gurgaon
Class : Class 6
(D) is totally false . raincoat is made from plastic only which is a man made fiber .

Ans 2:

khushi Joshi from Svkm , Mumbai
Class : Class 6
Silk can't be worn in monsoon and winter, because it is not waterproof and it does not trap heat.

Ans 3:

VIJAYA SREYAS B from NARAYANA OLYMPIAD SCHOOL KUKATPALLY, HYDERABAD
Class : Class 6
D is false as silk cannot be worn in all seasons .

Ans 4:

khushi Joshi from Svkm , Mumbai
Class : Class 6
That is why Silk cannot be worn in all seasons

Post Your Answer

celina srivastava from ryan global school, mumbai
Subject :NSO    Class : Class 3

Ans 1:

Ananya from birla school, Kalyan
Class : Class 3
B

Post Your Answer

celina srivastava from ryan global school, mumbai
Subject :NSO    Class : Class 3

Ans 1:

celina srivastava from ryan global school, mumbai
Class : Class 3
I acseped my mistake

Ans 2:

Vanama Aditya Siddharth from Gitanjali Devashray, Secunderabad
Class : Class 3
I feel it is still not new moon as there are a couple of days for it to become a new moon.

Post Your Answer

Nishanth from SBPS, Bengaluru
Subject :NSO    Class : Class 5

Ans 1:

Nishanth from SBPS, Bengaluru
Class : Class 5

Post Your Answer

ADVAY.JAIN.4B.dpsn from DPS Noida, Noida
Subject :NSO    Class : Class 4

Ans 1:

ikshika kumar from MVN SCHOOL, FARIDABAD
Class : Class 4
C) x y

Post Your Answer

Aadhya Singh from Billabong high International School, Noida, Ghaziabad
Subject :NSO    Class : Class 6

Read the given passage where some of the words have been italicised.
Cotton plant is annual shrub. It grows best in cold climate. Black soil is best suited for the cultivation of cotton plant. The stems of cotton plant are called cotton bolls. The seeds with cotton fibres are picked from the cotton bolls by hand. After picking the fibres are separated from the seeds by a process called combing.
Select the correct option regarding this.

A Annual should be replaced by biennial.
B Cold should not be replaced as it is correctly mentioned.
C Black should be replaced by yellow and stems should be replaced by fruits.
D Combing should be replaced by ginning.


answer is D

Ans 1:

VIJAYA SREYAS B from NARAYANA OLYMPIAD SCHOOL KUKATPALLY, HYDERABAD
Class : Class 6
D is correct, combing should be replaced by ginning

Ans 2:

khushi Joshi from Svkm , Mumbai
Class : Class 6
ans is D

Ans 3:

soubhik raha from bishop morrow school, nabadwip
Class : Class 6
correct answer should be d

Ans 4:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
yes combing should be replaced because combing is the process of of straitning cotton fibers

Ans 5:

khushi Joshi from Svkm , Mumbai
Class : Class 6
Ginning is a process used to separate cotton fibres from seeds while combing is the process of disentangling fibres

Post Your Answer

ArhamAnay Jain 4G from MDPS, Faridabad
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

Post Your Answer

khushi Joshi from Svkm , Mumbai
Subject :NSO    Class : Class 6

Ans 1:

VIJAYA SREYAS B from NARAYANA OLYMPIAD SCHOOL KUKATPALLY, HYDERABAD
Class : Class 6
Our body is made of mostly made of impure water which is a good conductor of electricity. Our body also has a lot of metallic minerals like iron which conduct electricity.

Ans 2:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
because our body contains minerals like iron and has a large quantity of un - distilled water

Post Your Answer

khushi Joshi from Svkm , Mumbai
Subject :NSO    Class : Class 6

Ans 1:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
because our body contains minerals like iron and has a large quantity of un - distilled water

Post Your Answer