National Science Olympiad Forum By SOF Olympiad Trainer

JIGYANSHU from VIDYANTRIKSH, Bhiwani

Subject :NSO Class : Class 9

Which of the following represents the correct increasing order of the densities of given substances?

A Cotton < Exhaust from chimneys > Honey < Iron < Air
B Air < Exhaust from chimneys < Cotton < Honey < Iron
C Cotton < Air < Exhaust from chimneys < Iron < Honey
D Air < Cotton < Exhaust from chimneys < Iron < Honey

grghthe

View All Answers (1)

Ans 1:

JIGYANSHU from VIDYANTRIKSH, Bhiwani

Class : Class 9

Submit Your Answers

Post Your Answer

Ayaan jamal from Dddddd, Delhi

Subject :NSO Class : Class 8

Which of the following statements are correct?
(i) Cochineal insect is used to eliminate Opuntia.
(ii) Water logging decreases the amount of salts in the soil that increases soil fertility.
(iii) Fertilisers are not readily soluble in water, so they are absorbed by the plants slowly.
(iv) Rust of wheat is a fungal disease.
(v) The practice of growing two or more dissimilar crops in the same field one after the other is called mixed cropping.

A (i), (ii), (iii) and (v) only
B (i) and (iv) only
C (ii) and (iv) only
D (iii), (iv) and (v) only

View All Answers (3)

Ans 1:

Vihaan Nair from Ambassador School, DUBAI

Class : Class 8

Ans 2:

Vihaan Nair from Ambassador School, DUBAI

Class : Class 8

Ans 3:

Vihaan Nair from Ambassador School, DUBAI

Class : Class 8

Submit Your Answers

Post Your Answer

Ayaan jamal from Dddddd, Delhi

Subject :NSO Class : Class 8

Crop plants may be attacked by pests which affect the crop production. Fungi are such type of pests which cause diseases like

A Smut of wheat
B Citrus canker
C Blight of potato
D Both (A) and (C).

answer will be D , because both , blight of potato and smut of wheat are caused by a fungus

View All Answers (1)

Ans 1:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore

Class : Class 9

how come?

Submit Your Answers

Post Your Answer

Shuvangi Das from Vivekananda mission school, haldia

Subject :NSO Class : Class 6

Which of the following is not the correct difference between weaving and knitting?

AWeaving is done by machine while knitting is done by hands only.
BWeaving uses one yarn while knitting uses two sets of yarn.
CWeaving is done for silk only while knitting is done for wool only.
DAll of these

View All Answers (4)

Ans 1:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore

Class : Class 9

Yes, Srijan from VIBGYOR HIGH Bangalore, you are right SOF why you are doing this????

Ans 2:

Ayan Vohra from Bhavan Vidyalaya , Chandigarh, chandigarh

Class : Class 8

it is saying NOT you little dum dums

Ans 3:

Srijan Anand from VIBGYOR HIGH, Bangalore

Class : Class 7

the right answer is b, sof too tell it in its explanation

Ans 4:

Sai Srivardhan from Maharishi Vidya Mandir Chetpet, Chennai

Class : Class 9

no

Submit Your Answers

Post Your Answer

Shuvangi Das from Vivekananda mission school, haldia

Subject :NSO Class : Class 6

Which of the following statements are incorrect?
I. A bag placed below the seat of a moving bus is in motion with respect to the floor of the bus.
II. While measuring length of an object using a metre scale, use the zero-mark even if the ends are worn out.
III. Blinking of eyes is an example of oscillatory motion.
IV. If a body as a whole moves around in a circular path, the motion is known as revolution.

AI, II and IV only
BI, II and III only
CII, III and IV only
DI, III and IV only

View All Answers (1)

Ans 1:

Dushyant Singh from Shree Ram Centenial School, Indore

Class : Class 9

Submit Your Answers

Post Your Answer

Ojaswi from SAINT JOHNS CONVENT SCHOOL LANSDOWNE, DELHI

Subject :NSO Class : Class 6

Observe the two shallow dishes kept in the sun carefully containing equal amount of water.

After few hours, in which dish will the water level not come down?

ADish 1
BDish 2
CIn both dishes water level will not come down.
DIn both dishes water level will come down.

View All Answers (0)

Submit Your Answers

Post Your Answer

anu from Haralur, Bengaluru

Subject :NSO Class : Class 1

A rabbit was kept in a closed box with food and water, yet it died. Which of the following could be a reason for this?

AThe rabbit did not get sunlight.
BThe rabbit did not get air.
CThe rabbit did not get enough space.
DAll of these

b

View All Answers (3)

Ans 1:

vihana from vidyashilp school, banglore

Class : Class 4

b

Ans 2:

Shaurya vardhan agarwal from Calcutta International School , Kolkata

Class : Class 1

b

Ans 3:

anu from Haralur, Bengaluru

Class : Class 5

b

Submit Your Answers

Post Your Answer

anu from Haralur, Bengaluru

Subject :NSO Class : Class 1

Find the missing shape in the given figure.

ACircle
BTriangle
CSquare
DRectangle

c

View All Answers (2)

Ans 1:

Shourya Pratap from Daffodils English medium school, Gwalior

Class : Class 8

Ans 2:

from ,

Class :

Submit Your Answers

Post Your Answer

SAMARPAN DAS from Notre Dame Academy, Salakati Kokrajhar

Subject :NSO Class : Class 2

What should Amol include in his diet to develop strong muscles required for being a sportsperson?

A Fish, sweets and butter
B Fish, eggs and pulses
C Chips, fruits and oil
D Rice, jaggery and burger