National Science Olympiad Forum By SOF Olympiad Trainer

HARSHIKAA DHAR from Delhi Public School, Noida

Subject :NSO Class : Class 4

Beena observed the Moon on 15th December and drew its sketch as shown. What will be the shape of the moon on 13th January ?

(A)

(B)

(C)

(D)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is C.

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HARSHIKAA DHAR from Delhi Public School, Noida

Subject :NSO Class : Class 4

Find the perimeter of the given figure (not drawn to scale).

(A) 68 cm

(B) 65 cm

(C) 57 cm

(D) 71 cm

Ans 1:

Priyam Bhattacharya from cambridge court high school, jaipur

Class : Class 6

Ans 2:

S Nithyanth from Geethanjali Vidyalaya, Bangalore

Class : Class 6

Ans 3:

ABHAY AGARWAL from ,

Class : Class 3

Ans is sixty five (B)

Ans 4:

ABHAY AGARWAL from ,

Class : Class 3

This is terrible

Ans 5:

S Nithyanth from Geethanjali Vidyalaya, Bangalore

Class : Class 6

same

Ans 6:

Jayanth from The Deens Academy, Bengaluru

Class : Class 4

Ans 7:

OISHIK KUNDU from Delhi Public school North kolkata, baranagar

Class : Class 4

same as me

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Sumeet Verlekar from ,

Subject :NSO Class : Class 5

The Agra Fort is made up of which kind of rocks?

A Limestone
B Sandstone
C Granite
D Marble

Not everyone knows the Agra fort therefore they will not be able to answer this question so this question is irrelevent. Agra fort information is also not provided in any study material of MTG.

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Adivishnu SP from Delhi Public School Nadergul, Hyderabad

Subject :NSO Class : Class 4

In the given food web, how many animals are
a. only plant eaters?
b. only animal-eaters?

            a            b
A 3            4
B 2            2
C 1            5
D 4            3

explain it please

Ans 1:

Sarthak Gupta from DPS, Haryana

Class : Class 4

Ans 2:

Advika Narkar from Vibgyor High Airoli, Navi Mumbai

Class : Class 4

They haven't specified that it should be ONLY animal eater.

Ans 3:

TANVI D MARGHADE from PODAR INTERNATIONAL SCHOOL , POWAI MUMBAI

Class : Class 4

Ans 4:

Aahana Agarwal from NPS Koramangala, Bengaluru

Class : Class 6

They haven't said that the only animal eaters .

Ans 5:

Lakshya Singh Tomar from DPS Noida, Noida

Class : Class 4

please SOF don`t be mad

Ans 6:

BV Karthikeya from Sentia, Hyderabad

Class : Class 6

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Supratim Biswas from DPS RUBY PARK KOLKATA, kolkata

Subject :NSO Class : Class 5

Approximate what percentage of the earth is illuminated by the Sun at any given time?

A10%
B25%
C50%
D90%

Ans 1:

SHREYAS ANDOTRA from RYAN INTERNATIONAL SCHOOL, CHANDIGARH

Class : Class 8

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Anhiti Mandal from Shri Ram School, Gurgaon

Subject :NSO Class : Class 6

Manu has three identical roses but of different colours; red, yellow and white. She shines a torch on the three roses in turn and gets a shadow on the wall in each case. Deepak who is observing the shadows formed on the wall can

ADistinguish shadow of red rose only.
BDistinguish shadow of red rose only
CDistinguish shadows of all the three roses.
DNever distinguish the shadows of three roses.

why is it d

View All Answers (3)

Ans 1:

Arunangshu Karmakar from Salt Lake School (English Medium), Kolkata

Class : Class 6

All the three roses are opaque and will have the same shadow. Regardless of the colour of the rose, the colour of the shadows will always be something darker than the colour of the wall. Thus, no rose could be distinguished from the other by looking at their shadows. So D is the correct answer.

Ans 2:

Soham Panchal from ,

Class : Class 6

This is because the colour of the shadow is always black even if the colour of screen orthe colour of the light is different...

Ans 3:

khushi Joshi from Svkm , Mumbai

Class : Class 9

Since the colour of the shadow doesn't depend on the colour of the object, you cannot distinguish the roses from each other as the colour of the shadow (black) will remain same for all the roses.

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jyothir from National Public School, Yelahankat, Bengaluru

Subject :NSO Class : Class 6

What is the smallest number of squares that must be added so that the line MN becomes a line of symmetry?

(A) 4

(B) 5

(C) 6

(D) 7

View All Answers (2)

Ans 1:

student from school, city

Class : Class 9

Ans 2:

Pulkit Khanna from DELHI PUBLIC SCHOOL RUBY PARK KOLKATA, Kolkata

Class : Class 9

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SOMRAJ HAZRA from Modern Delhi Public School, Faridabad

Subject :NSO Class : Class 3

Find the missing number in the pattern below. 7982, 7992, ? , 8012, 802

(A) 7002

(B) 8002

(C) 7993

(D) 8902
it is very di

View All Answers (1)

Ans 1:

Admin from Revisewise, Noida

Class : Class 3

7982 + 10 = 7992 + 10 = 8002 + 10 = 8012 + 10 = 8022 Answer will be B

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Adivishnu SP from Delhi Public School Nadergul, Hyderabad

Subject :NSO Class : Class 4

Which of the following are NOT means of mass communication?
a. Telephone
b. Magazine
c.   Postcard
d. Newspaper
e.  Television
f.   Radio

A a , b and d
B d , e and f
C b and c
D a

Can I get an explanation for this

View All Answers (5)

Ans 1:

Iraj Singh from DPS Megacity, Kolkata

Class : Class 5

The correct answer is D.

Ans 2:

Meghav Ladani from zydus school for excellence, ahmedabad

Class : Class 6

Ans 3:

Archit Das from NPS, Singapore

Class : Class 4

Ans 4:

Vivaan from Rustomjee Cambridge International School and Junior College, Mumbai

Class : Class 6

Ans 5: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is D.

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B Swaminathan from CHIREC Public School, Kondapur, Hyderabad

Subject :NSO Class : Class 9

Which of the following does not excrete uric acid?

(A) Birds

(B) Mammals

(C) Land snakes

(D) Lizards
Mammals do excrete uric acid! How is this....

View All Answers (1)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

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