National Science Olympiad Forum By SOF Olympiad Trainer

john from allen institute, Rajkot

Subject :NSO Class : Class 8

When some liquid evaporates, the average speed of the molecules remaining will ____.

(A) Increase because the more energetic molecules have left

(B) Decrease because the more energetic molecules have left

(C) Remain unchanged because all molecules have about the same speed

(D) Increase because there are fewer molecules

Ans 1:

john from allen institute, Rajkot

Class : Class 8

Ans 2:

Albin from Indian School al Buraimi , Buraimi

Class : Class 8

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Arnav Yadav from Delhi Public School Rohini ,New Delhi, New Delhi

Subject :NSO Class : Class 3

What will be the weight of object X on Moon if it weighs 36 kg on Earth?

A36 kg
B216 kg
C6 kg
D10 kg

PLEASE MAKE ME UNDERSTAND WHY

Ans 1:

Karangat house from Navy Children School, Payyannur

Class : Class 3

6 kg . because wheight is 1/6 on moon

Ans 2:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

C

Ans 3:

Arnav Yadav from Delhi Public School Rohini ,New Delhi, New Delhi

Class : Class 6

Ans 4:

Vidita from Manav Rachna international school sector 51 Gurugram, Gurgaon

Class : Class 5

I don't get it?

Ans 5:

Arnav Yadav from Delhi Public School Rohini ,New Delhi, New Delhi

Class : Class 6

Ans 6:

Arnav Yadav from Delhi Public School Rohini ,New Delhi, New Delhi

Class : Class 6

PLESE MAKE ME UNDERSTAND

Ans 7:

reena yadav from dps haridwar, haridwar

Class : Class 3

please make me understand

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Arnav Yadav from Delhi Public School Rohini ,New Delhi, New Delhi

Subject :NSO Class : Class 3

The given box contains some materials.

Which of these materials are bad conductors of heat?

A1 and 2 only
B2 and 3 only
C3 and 4 only
D2, 3 and 4 only

TRICKY ONE

Ans 1:

k tagore from montessori school, KURNOOL

Class : Class 3

Ans 2:

Nishant Hazarika from Air Force School, Dibrugarh

Class : Class 3

Wood is a good conductor of heat as it can burn easily

Ans 3:

k tagore from montessori school, KURNOOL

Class : Class 3

glass are bad conducters of heat

Ans 4:

k tagore from montessori school, KURNOOL

Class : Class 3

Ans 5:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

c

Ans 6:

Mohi from Vibgyor, Bangalore

Class : Class 6

A. Wood and Glass

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Abhir Deshpande from Wisdom High International School, Nashik

Subject :NSO Class : Class 6

What is common between Goat, Rabbit, Sheep, Yak and Vicuna?

A They all are omnivore animals
B They are considered as cattles
C They are the source of wool
D They are wild animals

how can a goat give wool?

Ans 1:

from ,

Class : Class 7

The answer. is B

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Khushajh verma from jayshree periwal high school, jaipur

Subject :NSO Class : Class 9

An element X has the 4th shell as the valence shell. If the difference in the number of electrons between K and N shells and between L and M shells is zero, then the atomic number of the element X will be

A 12
B 10
C 2
D 20

it would be (d) because if 4 shells are present in an atom then rest of the answers don't make sense !!!!

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Ans 1:

Shriya from Dr CL Metha Shishya, Chennai

Class : Class 10

Ans 2:

Shriya from Dr CL Metha Shishya, Chennai

Class : Class 10

Ans 3:

Chaitanya Gawade from JPS, Pune

Class : Class 9

ANS will be D as difference between 1st and 4th shell = 0 stating it has 2 valence electrons and difference between 2nd and 3rd shell is also 0,stating 2nd and 3rd shell have 8 electrons if you get time pls solve my forum questions thanks

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Arnav Yadav from Delhi Public School Rohini ,New Delhi, New Delhi

Subject :NSO Class : Class 3

Which is the heaviest ball?

A M
B N
C O
D Can‘t be determined

EASY PEASY

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Ans 1:

SS from meridian, hyderabad

Class : Class 5

ohhhhh my favroutie yaar

Ans 2:

Shrihan Koley from Radiant International School , Patna

Class : Class 5

Ans 3:

SS from meridian, hyderabad

Class : Class 5

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Harsh Sobti from the samhita academy, BLR

Subject :NSO Class : Class 4

Which of the following statements are correct?
1. Vitamin A helps to make our bones and teeth strong.
2. Iron helps in the formation of blood.
3. Potassium is present in sprouts and bananas.
4. Vitamin D helps in wound healing and found in whole grains.

A 1 and 3 only
B 2 and 3 only
C 3 and 4 only
D 2 and 4 only

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Ans 1:

Aadya Kawale from Podar International ICSE , Dombivli East

Class : Class 4

SolutionLet’s check the given statements and find the correct ones:1. Vitamin A helps to make our bones and teeth strong. ----- Calcium helps to make our bones and teeth strong. Vitamin A is important for normal vision, good immune system, and reproduction. So, this option is Incorrect.2. 2. Iron helps in the formation of blood. ----- Iron is an important component of haemoglobin. Haemoglobin is the substance in red blood cells that carries oxygen from our lungs to all parts of our body. Haemoglobin also plays a major role in the transport of carbon dioxide from the tissues back to the lungs. So, this option is Correct.3. Potassium is present in sprouts and bananas. ----- Bananas, oranges, cantaloupe, honeydew, apricots, grapefruit, dried fruits, potatoes