National Science Olympiad Forum By SOF Olympiad Trainer - Page 339
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Somebody from Delhi Private School, Neverland
Subject :NSO    Class : Class 7

Ans 1:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
The answer is Option C.. Because burning of candle is both physical and chemical change(melting of wax could be assumed as physical change and the burning of the thread can be assumed as chemical change.. Also, sublimation of wax also takes place and can be classified as physical change.)

Ans 2:

Dhruv Singh from VIBGYOR HIGH HORAMAVU, BANGALORE
Class : Class 9

Ans 3:

Advika Behera from Sardar Patel Vidyalaya, New Delhi , New Delhi
Class : Class 5
why isn't the answer a that cutting wood can be a physical change (dead tree) and a chemical change ( all chemical reactions have stopped )

Ans 4:

Advika Behera from Sardar Patel Vidyalaya, New Delhi , New Delhi
Class : Class 5

Ans 5:

Maanasa from Billabong high, Chennai
Class : Class 7
a

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Shubham from Litera valley, Patna
Subject :NSO    Class : Class 7

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Sujal Anand from Delhi World Public School, Jamshedpur
Subject :NSO    Class : Class 8

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 4

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D

There two 'S' in the word 'COSMOS' so, 'COSMOS' cannot be made from the given word.


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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 4

Ans 1:

Mohhika Sharma from Delhi Public School Greater Noida, Greater Noida
Class : Class 7

Ans 2:

Advay Rustagi from Vidyashilp Academy , Bengaluru
Class : Class 5
SCISSORS ARE : WEDGE, SCREW

Ans 3:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Admin is correct

Ans 4:

Om Satish Punse from Terna Orchid the international school koparkhairne, Navi mumbai
Class : Class 7
What are first class levers and second class levers?

Ans 5:

Kavin from ISG , Muscat, Muscat
Class : Class 5
snow white are you too selected this year 2020-2021

Ans 6:

Mohhika Sharma from Delhi Public School Greater Noida, Greater Noida
Class : Class 7
Well, why don't they teach all this stuff in the synopsis?!They should, but, Admin from revisewise is correct.

Ans 7: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

B

Tweezers are third class lever whereas see-saw, crowbar and scissors are first class levers.


Ans 8:

Syed Hrehaan Ahamed from Bahrain Indian School, Manama
Class : Class 8

Ans 9:

Sanaya Singh from Hiranandani Foundation, Mumbai
Class : Class 2
The person called admin is correct

Ans 10:

Mohhika Sharma from Delhi Public School Greater Noida, Greater Noida
Class : Class 7
I think that he/she is.

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Debarpan Das from Delhi Public School , Durgapur
Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

B

 Embankment is built on the banks of the river. It stops the water of the river from flooding the fields.


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SANJEEV VARSHNEY from Lotus valley international school, Noida
Subject :NSO    Class : Class 7

Ans 1:

Rithvik from BVM Global, Chennai
Class : Class 9
True plastic is a BAD CONDUCTOR but it’s not an INSULATOR right? So possibly it would naturally take some time .

Ans 2:

Trina from Ganges Valley School, Hyderabad
Class : Class 10
plastic is a bad conductor then it would be C

Ans 3:

Archishman Pal from Sri Krishna Mission School, Agartala
Class : Class 9
I agree with Srijan Anand !!!

Ans 4:

Srijan Anand from VIBGYOR HIGH, Bangalore
Class : Class 7
Plastic is not a good conductor of heat. So how should the answer be A?

Ans 5:

Anshika Minocha from DPS Vasant Kunj, NEW DELHI
Class : Class 10
I agree.

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Necro from New Tulip international school, Ahmedabad
Subject :NSO    Class : Class 7

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student from school, city
Subject :NSO    Class : Class 7

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