National Science Olympiad Forum By SOF Olympiad Trainer - Page 36
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Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

Earth takes 24 hours for one complete rotation on its axis. If rotational speed of Earth is halved then it will complete one rotation in just double time i.e., 48 hrs. Earth completes one revolution in its orbit around Sun in about 365 days. If distance between Earth and Sun is doubled, i.e., radius of Earth's orbit is doubled then it will complete one revolution around Sun in just double time, i.e., 730 days.


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Aarnav Grover from Anand Niketan Shilaj, Ahmedabad
Subject :NSO    Class : Class 4

Rajesh set up an experiment as shown in the figure.

He placed two cockroaches in both the jars X and Y. The cockroaches in jar X were given air and water. The cockroaches in jar Y were given air, water and food. From his experiment Rajesh was trying to find out ___.

AWhether the cockroaches need air to live
BWhether the cockroaches need food to live
CWhether the cockroaches need water to live
DWhether the cockroaches can live together in the dark


b

Ans 1:

Kiran from DPS, Bengaluru
Class : Class 4
b

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

B


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Mohit Sheth from Utpal Shanghvi Global School, Mumbai
Subject :NSO    Class : Class 4

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Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Subject :NSO    Class : Class 4

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Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Subject :NSO    Class : Class 4

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Shiven Dinkar from DPS Noida, Delhi
Subject :NSO    Class : Class 4

Ans 1:

Ryan from YBIS , SINGAPORE
Class : Class 5

Ans 2:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 7
Boiling point is 100 Degree Celsius C and D are eliminated and if he heats it for 15 min level should be less than 100 ml so A is eliminated so answer is B Don't you know boiling point and freezing point? Boiling point 100 degree celsius Freezing point 0 degree celsius so easy search on google

Ans 3:

Ashwak from Cambridge, Jalandhar
Class : Class 8
Ashmi and Mohhika are are right . If the person has qualified for level 2 then he / she should know the boiling and freezing point of water . If you don't know the boiling and freezing point of water you can also search it in Google and get some more information about this topic . Then you can clearly see that Me , Mohhnika and Ashmi are correct . If you say that A and B are same , then you are wrong because when water boils some of that water evaporates .

Ans 4:

Ryan from YBIS , SINGAPORE
Class : Class 5

Ans 5:

Mohhika Sharma from Delhi Public School Greater Noida, Greater Noida
Class : Class 7
Yes Ashmi ,you are right.One should know the boiling point and freezing point if that person has qualified for level 2.This is so easy-peasy.You can even search on the Google.You will see that me and Ashmi are correct.It is not that you know or not, it is that you should know.And even if you did know, then it is about applying your knowledge at the right place.Also you should know that when we boil water, the water becomes lesser.If you knew both the things then you must have thought that 'B' and 'D' are the same.It happens with me too.I also think the answer should be option 'B'.

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Shiven Dinkar from DPS Noida, Delhi
Subject :NSO    Class : Class 4

Ans 1:

Adithya Sathyanarayanan from Chennai Public School, Chennai
Class : Class 6

Ans 2:

Ashwak from Cambridge, Jalandhar
Class : Class 8
Admin , all know the answer . But can give the explanation , you always write the answer only

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C


Ans 4:

Samridh from DelhiPublicSchoolBangloreNorthCambridgeInternational, banglore
Class : Class 6
c

Ans 5:

Sashrika Pasunoori from KV Gachibowli, Hyderabad
Class : Class 5
I don't have explanation but answer is C

Ans 6:

Iraj Singh from DPS Megacity, Kolkata
Class : Class 7
C

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Vivaan from Rustomjee Cambridge International School and Junior College, Mumbai
Subject :NSO    Class : Class 4

Ans 1:

Ashwak from Cambridge, Jalandhar
Class : Class 8
Answer is A because in A it is written 1- Cow 3- Bear ( correct ) in B it is written 2- Crow 3- Squirrel ( incorrect because crow is an omnivore and squirrel is herbivore ) in C it is written 3 - Lion 1- Fox ( incorrect because lion is a carnivore and fox is also a carnivore ) in D it is written 2 - Sparrow 1 - Eagle ( incorrect because sparrow is an omnivore and eagle is a carnivore )

Ans 2:

Hamzah Inamdar from SHARDA ENGLISH SCHOOL KAIJ DIST BEED, KAIJ
Class : Class 4
Correct answer is A

Ans 3:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Class : Class 7
I HAVE DONE A

Ans 4:

ABHIRAJ from BKKG, CHAPRA, SARAN, CHAPRA
Class : Class 7
A

Ans 5:

Ashwak from Cambridge, Jalandhar
Class : Class 8
Answer is A because in A it is written 1- Cow 3- Bear ( correct ) in B it is written 2- Crow 3- Squirrel ( incorrect because crow is an omnivore and squirrel is herbivore ) in C it is written 3 - Lion 1- Fox ( incorrect because lion is a carnivore and fox is also a carnivore ) in D it is written 2 - Sparrow 1 - Eagle ( incorrect because sparrow is an omnivore and eagle is a carnivore )

Ans 6:

Manvi from MRA DAV PUBLIC SCHOOL BYE PASS SOLAN, Solan
Class : Class 4
A as cow is herbivores as it is veg and bear is veg as well non vwg omnivores

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Sarthak Jay Singh from Prudence, New Delhi
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

B

Rohit tried to push a wall but failed to do so. that means he applied some force in the wall, but the wall did not move. So, some energy is spent, but no work is done.


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Elizabeth from Birla Public School, Doha
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

A

Shadows move during the day, and their length changes. They are longest in morning and evening. They are shortest at noon. So, Option A is the right answer.


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