National Science Olympiad Forum By SOF Olympiad Trainer

Aditya Gad from Hedgewar High School Goa , Panaji

Subject :NSO Class : Class 6

An object looks green in white light. Now the white light is passed through a clear blue plastic on the same object.
What colour will the object appear to be?

AGreen
BMagenta
CBlack
DRed

the answer is black why not blue and why black

Ans 1:

Ayan Vohra from Bhavan Vidyalaya , Chandigarh, chandigarh

Class : Class 8

VERY NICE ANSWER GIVEN BY ANSH, SUCH BEAUTIFUL EXPLANATION THAT I DON'T EVEN SEE IT!!!!!!

Ans 2:

Subhang Deep Sahu from Chrysalis High Kadugodi . , Bangalore

Class : Class 7

Ans 3:

Ansh Jain from DPS, Mahendra Hills

Class : Class 9

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Manasvi from Apeejay school pitampura, Delhi

Subject :NSO Class : Class 8

The below figures show the forces required to move a 100 g object over different surfaces. The friction is greatest at

A Surface P
B Surface Q
C Surface R
D Surface S

How come is the answer surface P... when we have to tell where the friction is greatest.Surface S stops the object the earliest that means it is the roughest and the highest of friction as well...

Ans 1:

Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune

Class : Class 8

The question is confusing. It should explain the ask better

Ans 2:

Vihaan Nair from Ambassador School, DUBAI

Class : Class 8

I feel question is tricky

Ans 3:

Arjun Joshi from Allen Career Institute, Dombivli East

Class : Class 8

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Ishan Patil from D.A.V. B.O.R.L. Public School ,Bina, Bina

Subject :NSO Class : Class 7

Rupali classified a few changes occurring around us as shown in the table.

S. No.	Change	Chemical	Physical	Reversible
1.	Grinding of wheat	✓	✗	✗
2.	Bursting of crackers	✓	✗	✗
3.	Formation of clouds	✗	✓	✓
4.	Germination of seeds	✓	✗	✓
5.	Drying of wet clothes	✗	✓	✗

Which of her observations are incorrect?

A1 and 2 only
B2 and 3 only
C1, 4 and 5 only
D1, 2, 3, 4 and 5

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shiza from iqra international english school and junior college, nanded

Subject :NSO Class : Class 1

inscisors are used for

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Saiansh Biswas from Little Flower School, Jamshedpur

Subject :NSO Class : Class 1

Select the odd one out.
A Eyes
B Ear
C Nose
D Hand

Question need to be more logical, as other options have two in the human body except the nose.

Ans 1:

ZAID FIROZ ANSARI from St. Peter's, Bangalore

Class : Class 3

but pair

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Saiansh Biswas from Little Flower School, Jamshedpur

Subject :NSO Class : Class 1

Refer to the given diagram and select the option that correctly identifies the plant X.

A Neem
B Sunflower
C Mustard
D Coconut

Neem should be the correct answer.

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Sowmya Chandrasekaran from DAV GIRLS SENIOR SECONDARY SCHOOL, Chennai

Subject :NSO Class : Class 1

Payal is looking at the sky and observes that bright and yellow Sun is gradually turning orange. What time of the day does it most likely indicate?

A6:00 in the morning
B6:00 in the evening
C12:00 in the afternoon
D10:00 in the morning

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Shridatree from GMGS, Kolkata

Subject :NSO Class : Class 2

Refer to the given figures.

Which of these means of transport can be used for a long distance travel?

Aa, b and c only
Bb and d only
Cb, c and d only
Dc and d only

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Aishwarya B from Shantiniketan International School , Hyderabad, HYD

Subject :NSO Class : Class 7

Given graph shows the first few seconds of a motor cycle ride. In the graph, the motor cycle travels _____.

AAt increasing speed and then stops
BWith constant acceleration and then stops
CWith constant acceleration and then at constant speed
DAt constant speed and then slows down

In a speed and time graph a slope means that there is constant acceleration, then there is a straight line parallel to time which shows uniform speed

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Akshaj Vardhan Kothapalli from Delhi Public School, Hyderabad

Subject :NSO Class : Class 5

Refer to the given conversation among three friends.

Which of these children made a correct statement?

AKunika only
BPriyanka only
CPriyanka and Rajan only
DKunika and Rajan only

Looks like enamel is what covers the crown of a tooth, not dentine.

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Ans 1:

Kanishk Adarsh Kumar from Amity International School, Noida, Sector 44, Noida

Class : Class 5

Total eight premolars and enamel covers the teeth so, b is correct.

Ans 2:

Rujula Sandip Patil from Saraswati Vidyalaya and J.R. College, Thane

Class : Class 3

Option C is correct

Ans 3:

Purohit Mohit Viralbhai from SDA higher secondary school, ahemdabad

Class : Class 8

option b is correct enamel covers the crown of a tooth

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