National Science Olympiad Forum By SOF Olympiad Trainer - Page 679
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Gauri Singh from St Johns School Marhauli, Varanasi
Subject :NSO    Class : Class 5

Ans 1:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8

Ans 2:

AREEN from BOLTON, HYDERABAD
Class : Class 6
Ans is A because lungs send oxygen-rich blood to the heart and this oxygen-rich blood is sended to all body parts and the carbondioxide-rich blood goes back to the heart from the body this carbondioxide-rich blood is sended to the lungs.

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Navneet Mathur from St Mary Convent Senior Secondary , Ujjain
Subject :NSO    Class : Class 7

Ans 1:

Medha Bhutani from Christ Academy, Bengaluru
Class : Class 9
4 th blank will be filled with fertilisation correct ans is b Pollen grains are deposited on stigma and not style

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Arkoprava Dey from Techno India Group Public School, Coochbehar, Coochbehar
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is D.

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ANSHUMAN RAJ from ST.THERESA'S CONVENT SR.SEC.SCHOOL KARNAL, KARNAL,HARYANA
Subject :NSO    Class : Class 3

Ans 1:

Ram Prasanna from Basil Woods International, Hyderabad
Class : Class 3
D

Ans 2:

MAYANK from Jain Public School, REWARI
Class : Class 9
C

Ans 3:

ANWESHA THAKUR from DPS SECTOR 132 NOIDA, NOIDA
Class : Class 7

Ans 4:

Shruti from ,
Class : Class 1
D HE GAVE EXPLANATION

Ans 5:

Aditri Dixit from TCIS, Bangalore
Class : Class 3

Ans 6:

Abhilash from ,
Class : Class 3
ahh... very easy answer is d

Ans 7:

Aditri Dixit from TCIS, Bangalore
Class : Class 3
NA

Ans 8:

Aneesh Balaji from BVBARR school, Hyderabad
Class : Class 9
c is the ans

Ans 9:

Aditri Dixit from TCIS, Bangalore
Class : Class 3

Ans 10:

Arnav Raj Sharma from Dpsvk, Gurgaon
Class : Class 9

Ans 11:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 2

Ans 12:

Vedansh from Akshara International school, Phne
Class : Class 3
c is the correct answer

Ans 13:

Arnav Raj Sharma from Dpsvk, Gurgaon
Class : Class 9
kunal is wrong

Ans 14:

Anagha from DPS BANGALORE NORTH, Bengaluru
Class : Class 3
It should be D

Ans 15:

Nivedha from Greenwood High, Bengaluru
Class : Class 3
HE DID NOT EXPLAIN.

Ans 16:

SS from meridian, hyderabad
Class : Class 5
abcd are correct

Ans 17:

Yatindra G from SBOA, Chennai
Class : Class 4
c maybe????

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arnav reddy from oakridge international school, hyderabad
Subject :NSO    Class : Class 3

Ans 1:

Aathrei MS Damodaran from Chrysalis High, Bengaluru
Class : Class 8
A is not correct D is correct

Ans 2:

Aathrei MS Damodaran from Chrysalis High, Bengaluru
Class : Class 8
D is correct

Ans 3:

Vineet Banode from New Horizon Scholars School, Pune
Class : Class 5

Ans 4:

Shruti from ,
Class : Class 1
d and Gaurika actually chocolate contains fats

Ans 5:

akshitha from Euroschool, Bengaluru
Class : Class 3
all of these

Ans 6:

Samik Praveen from Euro School Airoli, Mumbai
Class : Class 6
All of these

Ans 7:

Gaurika Bhasin from Genesis global school, Noida
Class : Class 2
Fruits (2) contain minerals and vitamins and are protective food. They help in recovering from illness. Overeating of fried food (1) leads to obesity as it contains fat that gets stored in the body. Chocolates (3) contain a lot of carbohydrates which give us energy when hungry.

Ans 8:

MAYANK from Jain Public School, REWARI
Class : Class 9
D

Ans 9:

Kartikey Kumar Jindal from Dikshant International School, Zirakpur
Class : Class 5
Everyone thinks that a option is correct but it is wrong.The correct answer is d part.Everyone will think that chocolate is junk food.How can it give us the energy but chocolate contains fat.That's why when when we are hungry it gives us a lot of energy

Ans 10:

Mahima g pillai from Arya central school, Trivandrum
Class : Class 6
D

Ans 11:

MAYANK from Jain Public School, REWARI
Class : Class 9
A

Ans 12:

Havi Jain from GEMS modern academy, Gurgaon
Class : Class 8
all of these option(D)

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Vivek Gulavani from Innisfree House School, Bengaluru
Subject :NSO    Class : Class 7

Ans 1:

Shubham Ashish Kulkarni from APEEJAY PITAMPURA, DELHI
Class : Class 8
shape of dish also should be included. Amount of water poured doesnt matter as long as you are collecting equal volume in all dishes. Hence similar dishes is important.

Ans 2:

Adhrit from CHSV, Chennai
Class : Class 8
Definitely D

Ans 3:

Agastya Tripathi from dps gurgaon, Gurgaon
Class : Class 4
Water is also correct

Ans 4:

Shreya Sudarshan from RVK - Banashankari, Bengaluru
Class : Class 7
All the given factors are required for a fair test ; So option D would be the correct answer

Ans 5:

Akshay Jha from DPS NERUL, Navi Mumbai
Class : Class 7
D, amount of water matters the most out of all.

Ans 6:

Rithvik from BVM Global, Chennai
Class : Class 9
d

Ans 7:

Shriyans from DPS Agra, Agra
Class : Class 8
D

Ans 8:

Aanya from DAV, Gurgaon
Class : Class 8
Option D is the correct answer

Ans 9:

Avaneesh Sai Vemparala from The knowledge habitat, Pune
Class : Class 3
The amount of water also matters right

Ans 10:

Palash sachin patel from Kips, Patan
Class : Class 8
d is correct answer

Ans 11:

ALICE from Delhi Public School, UDAIPUR
Class : Class 9

Ans 12:

Dhairya Vinayak from Loyola High School, Patna
Class : Class 8

Ans 13:

aditya ranjan from gyan niketan , patna
Class : Class 7
i think amount of water also nedd

Ans 14:

Mehaan Bhatt from Pawar Public School , Mumbai
Class : Class 6

Ans 15:

Anuraaj Salunkhe from St Gregorios High School, Mumbai
Class : Class 10

Ans 16:

Himanish Basu from Army Public School Kamaraj Road, Bangalore
Class : Class 7

Ans 17:

Tanmayi kiran giri from airforce force public school Vayusena Nagar, Nagpur, nagpur
Class : Class 9
I do agree it's D

Ans 18:

Medha Bijjaram from Prime Academy, Mumbai
Class : Class 9
I think D is the correct answer

Ans 19:

Antareep Mukherjee from New Horizon Public School, Bangalore
Class : Class 8

Ans 20:

shreya from GIIS, KualaLumpur
Class : Class 5

Ans 21:

Saksham Chanani from Sri Sri Academy, Kolkata
Class : Class 9
D

Ans 22:

Shreyans Mondal from Sri Chaitanya Techno School Kaggadasapura Campus 1, Bengaluru
Class : Class 10

Ans 23:

Kamal Manchenella from Delhi Public School, Hyderabad
Class : Class 7
I feel that it is D

Ans 24:

Riyan Nayak from DPS Newtown, Kolkat
Class : Class 7
c should be the correct answer

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Aswath Krishna from DPS EAST, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

Archisman Rout from Podar International School, Powai
Class : Class 7
A is correct because it just turns hard but it is still clay only.And also chemical change doesn't mean that it is irreversible,Chemical change means that the identity of the substance we started with is lost.Here the identity is not lost.So A is correct.

Ans 2:

Advay Das from Delhi Public School, Gurgaon
Class : Class 5

Ans 3:

RUDRAKSH BISWAS from MAYOOR PRIVATE SCHOOL, ABU DHABI
Class : Class 6
It really should be A

Ans 4:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
answer is a

Ans 5:

VIJAYA SREYAS B from NARAYANA OLYMPIAD SCHOOL KUKATPALLY, HYDERABAD
Class : Class 6
C because we can get clay back from a wet pot by smashing it,but once it heats up, it dries the clay and makes it stone hard.

Ans 6:

Hridhaan Talukdar from National Public School Koramangala, Bangalore
Class : Class 7

Ans 7:

ridhima from mdps, faridabad
Class : Class 6

Ans 8:

Vidula Malkar from DPYA High school, Mumbai
Class : Class 7
a is the correct answer because chemical composition dose not change

Ans 9:

ATHARV RAHUL MAHAJAN from ST. STEPHENS SCHOOL CHANDIGARH, SAS NAGAR
Class : Class 6
IF WE SHARP A PENCIL IT IS A PHYSICAL IRREVERSIBLE CHANGE .SO,IF WE HEAT A POT IS PHYSICAL IRREVERSIBLE CHANGE. BUT IT COULD HAPPEN THAT THE COMPOSITION OF CLAY MIGHT CHANE BECAUSE OF HEATING AS THE MOLECULES STICK TO EACH OTHER

Ans 10:

D Murari from Indian School of Excellence, Bangalore
Class : Class 9
C,because- it is a chemical change. after baking we can break it into smaller particles but it won't form the same clay, with same properties again

Ans 11:

Anika Saha from New Town School, KOLKATA
Class : Class 6
The answer is A.

Ans 12:

Arnesh from dps, delhi
Class : Class 6
It should be A

Ans 13:

Sohan Choudhury from Delhi Public School Electronic City Bengaluru, Bengaluru
Class : Class 6
on heating, the clay pot doesn't turn into stone,right?it doesn't change composition once heated , it is still clay ! answer is "A"

Ans 14:

Rasha Ranjan from DPS NOIDA , Vaishali
Class : Class 6
Yes ,Because chemical means change in the properties but there is no change .The answer is A

Ans 15:

Tanishtha from DPS, Greater Noida
Class : Class 7
c is the correct answer

Ans 16:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
A is the correct answer

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Vivek Gulavani from Innisfree House School, Bengaluru
Subject :NSO    Class : Class 7

Ans 1:

Harshdeep roy from Bhavans School , Nagpur
Class : Class 7
answer is option c

Ans 2:

Aksh Swarnkar from National Center for Excellence CVR, Bangalore
Class : Class 8

Ans 3:

Medha Bhutani from Christ Academy, Bengaluru
Class : Class 9
ans is option C

Ans 4:

saikrishna from bharatiya vidhya bhavans public school, Hyderabad
Class : Class 9
can someone explain why?

Ans 5:

Parshti Bajpai from Modern Public School, ALWAR
Class : Class 7
Please explain it to me.

Ans 6:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
ans is option C

Ans 7:

Lakshya Vijeta from Afgji, New Delhi
Class : Class 8
Option D is correct. I dont know why. Please explain

Ans 8:

Praveen Rai from Lotus Valley International School, Noida
Class : Class 7

Ans 9:

Aarnavi Mann from Scholars rosary Sr. Sec. School, Rohtak
Class : Class 8

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Pradhyumna from J S S Public School, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

Sandipta Bhattacharjee from Sri Ram Narayan Singh Memorial High School, Kolkata
Class : Class 5
Not kerwa its kewra. It is an extract that is distilled from the flower of the Pandanus plant. Kewra water is very similar to rosewater. It is used to flavour South Asian cuisine.

Ans 2:

Sandipta Bhattacharjee from Sri Ram Narayan Singh Memorial High School, Kolkata
Class : Class 5
jk kj;

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SANAJY GOPAL BHARTARIYA from ST. FIDELIS COLLEGE, LUCKNOW
Subject :NSO    Class : Class 6

Ans 1:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
it will be maximum near the ground

Ans 2:

VIJAYA SREYAS B from NARAYANA OLYMPIAD SCHOOL KUKATPALLY, HYDERABAD
Class : Class 6
As it goes up,kinetic energy decreases due to gravity while potential energy increases with height. As it comes down, kinetic energy increases due to gravity while potential energy decreases.

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