National Science Olympiad Forum By SOF Olympiad Trainer

Aarush from Podar, Mumbai

Subject :NSO Class : Class 4

Which of the following activities is/are useful for the environment?

(i) Composting leaves

(ii) Recycling glass and paper products

(iii) Fertilizing a lawn garden every week

(A) (iii) only

(B) (i) & (ii)

(C) (ii) & (iii)

(D) (ii) only.
please tell the answer

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

Post Your Answer

A Andrew from Lalaji Memorial Omega International School, Chennai

Subject :NSO Class : Class 4

Which out of the following tools can be used to measure quantity of water?

A
B
C
D

Ans 1:

Arkoprava Dey from Techno India Group Public School, Coochbehar, Coochbehar

Class : Class 9

answer is A

Ans 2:

OISHIK KUNDU from Delhi Public school North kolkata, baranagar

Class : Class 4

Ans should be A not c, since the container can measure only one quantity like 5 ltrs , but option A can measure different amount of water.

Ans 3:

AARUSH from DPS, Mumbai

Class : Class 4

C

Post Your Answer

A Andrew from Lalaji Memorial Omega International School, Chennai

Subject :NSO Class : Class 4

Which of the following is correct regarding the impact of deforestation?
(i) Plants of medicinal values found in the forest are lost.
(ii) Fewer trees are left around to hold the soil together, resulting in soil erosion.
(iii) Global warming occurs as there are fewer trees to absorb carbon dioxide.
(iv) The risk of an epidemic outbreak increases, resulting in the death of animals living in forests.

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

i have a doubt

View All Answers (2)

Ans 1:

Kaushik J from san academy , Chennai

Class : Class 5

Ans 2:

INDRANI GHOSH ROY from AMRITA VIDYALAYAM, Durgapur

Class : Class 5

No.C(i,ii,iii) are correct regarding deforestation.

Submit Your Answers

Post Your Answer

A Andrew from Lalaji Memorial Omega International School, Chennai

Subject :NSO Class : Class 4

Select the correct option for energy changes taking place with respect to given figure.

A Light energy → Mechanical energy → Kinetic energy
B Light energy → Chemical energy → Kinetic energy
C Chemical energy → Light energy → Kinetic energy
D Mechanical energy → Kinetic energy → Light energy

i have a doubt

View All Answers (1)

Ans 1:

AARUSH from DPS, Mumbai

Class : Class 4

B

Submit Your Answers

Post Your Answer

Aarush from Podar, Mumbai

Subject :NSO Class : Class 4

Which of the following statements are correct?

(i) Safety means being careful and avoiding accidents only when walking on the road.

(ii) There are rules and signs for safety of people on the ship.

(iii) We must use footpath for walking and cyclists must keep to the left.

(iv) We must cross the road as we like anywhere and everywhere.

(A) (i), (ii), & (iii)

(B) (ii) & (iii)

(C) (iii) & (iv)

(D) (i) & (iii)

View All Answers (1)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

Submit Your Answers

Post Your Answer

Yasmeen Shaikh from Ryan International CBSE, Mumbai

Subject :NSO Class : Class 4

Study the given diagram carefully. The number represented by (?) is _______.

(A) 24

(B) 16

(C) 64

(D) 196
how come 16

View All Answers (4)

Ans 1:

nitin loya from prabhat kids, Akola

Class : Class 4

easy but Brainny

Ans 2:

Himani Arora from JVM, Ballari

Class : Class 5

The logic behind answer..?

Ans 3:

Bidusmita Rath from Sri Chaitanya Techno School, Bangalore

Class : Class 5

how to formulate such a complex Q: in exam....?

Ans 4:

Adithi Keshava from National Center For Excellence , Bangalore

Class : Class 7

Submit Your Answers

Post Your Answer

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)

View All Answers (1)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is C.

Submit Your Answers

Post Your Answer

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

View All Answers (7)

Ans 1:

ABHAY AGARWAL from ,

Class : Class 3

Ans is sixty five (B)

Ans 2:

S Nithyanth from Geethanjali Vidyalaya, Bangalore

Class : Class 6

Ans 3:

ABHAY AGARWAL from ,

Class : Class 3

This is terrible

Ans 4:

OISHIK KUNDU from Delhi Public school North kolkata, baranagar

Class : Class 4

same as me

Ans 5:

Jayanth from The Deens Academy, Bengaluru

Class : Class 4

Ans 6:

Priyam Bhattacharya from cambridge court high school, jaipur

Class : Class 6

Ans 7:

S Nithyanth from Geethanjali Vidyalaya, Bangalore

Class : Class 6

same

Submit Your Answers

Post Your Answer

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

View All Answers (10)

Ans 1:

Aahana Agarwal from NPS Koramangala, Bengaluru

Class : Class 6

They haven't said that the only animal eaters .

Ans 2:

Lakshya Singh Tomar from DPS Noida, Noida

Class : Class 4

please SOF don`t be mad

Ans 3:

Punyatoya from Harvest, Bengaluru

Class : Class 7

Ans 4:

Sarthak Gupta from DPS, Haryana

Class : Class 4

Ans 5:

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

Class : Class 7

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

Ans 6:

BV Karthikeya from Sentia, Hyderabad

Class : Class 6

Ans 7:

TANVI D MARGHADE from PODAR INTERNATIONAL SCHOOL POWAI, MUMBAI

Class : Class 6

Ans 8:

Punyatoya from Harvest, Bengaluru

Class : Class 7

True

Ans 9:

RAGHAV VARSHNEY from CITY MONTESSORI SCHOOL GOMTINAGAR LUCKNOW, Lucknow

Class : Class 6

Ans 10:

Punyatoya from Harvest, Bengaluru

Class : Class 7

True

Submit Your Answers

Post Your Answer

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 (6)

Ans 1:

Archit Das from NPS, Singapore

Class : Class 6

Ans 2:

Nithya Soman from The Charter School, Eranakulam

Class : Class 2

gidjodl;.zmnaol,;d,vsjdik.rijziunewejndi,jzzjnxdmerbnebfxzudhsjpojfiujc,xi.kzopfxok,.t,bv

Ans 3: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is D.

Ans 4:

Vivaan from Rustomjee Cambridge International School and Junior College, Mumbai

Class : Class 6

Ans 5:

Iraj Singh from DPS Megacity, Kolkata

Class : Class 7

The correct answer is D.

Ans 6:

Meghav Ladani from zydus school for excellence, ahmedabad

Class : Class 8

User Forum

Ans 1: (Master Answer)

Ans 1:

Ans 2:

Ans 3:

Ans 1:

Ans 2:

Ans 1:

Ans 1: (Master Answer)

Ans 1:

Ans 2:

Ans 3:

Ans 4:

Ans 1: (Master Answer)

Ans 1:

Ans 2:

Ans 3:

Ans 4:

Ans 5:

Ans 6:

Ans 7:

Ans 1:

Ans 2:

Ans 3:

Ans 4:

Ans 5:

Ans 6:

Ans 7:

Ans 8:

Ans 9:

Ans 10:

Ans 1:

Ans 2:

Ans 3: (Master Answer)

Ans 4:

Ans 5:

Ans 6: