National Science Olympiad Forum By SOF Olympiad Trainer - Page 770
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Satweek Pradhan from Pallavi Model School, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

Atulya tripathy from Delhi Public School, sector 45, Gurgaon
Class : Class 10
52

Ans 2:

Abhideep Jain from Delhi Public School, Amethi
Class : Class 7
There are 110 active volcanoes in Japan

Ans 3:

shyam narayan nayak from kendriya vidyalaya no-1 unit 9 BBSR, Bhubaneswar
Class : Class 5
There are about 110 live volcanos in japan..........

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Mayank Patel from Maharaja Agarsen Public School , Ghaziabad
Subject :NSO    Class : Class 8

Ans 1:

Aishwarya Dwivedi from St. John's School, Marhauli, Varanasi
Class : Class 9
Lenses have a different property. You are talking about two different cases. First is property of 'refraction', and second is the property of 'convex lens'. This question is not correlated.

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Abhay Tyagi from Billabong High International School, Noida
Subject :NSO    Class : Class 6

Ans 1:

Lakshya Garg from DMI, Meerut
Class : Class 6
In the factories, Electromagnet is used to remove scrap iron from the waste. Electromagnet is fitted to a crane. When the operator switches it on by the electricity scrap iron is attracted towards the Electromagnet.

Ans 2:

Abhay Tyagi from Billabong High International School, Noida
Class : Class 10
Thanks but that wasnt what i asked. How does it work??!!

Ans 3:

SUBODH KUMAR from Delhi Public School, Bokaro
Class : Class 6
Basically in physics a magnet electrically charged posses a energy form called electromagnetic energy. This one posses a hole and a particle when made. Obviously particle will go in the hole and this is why electricity is defined as flow of electrons. Electromagnet is a temporally charged one used in MRI's, robots, etc.

Ans 4:

Mukil from Delhi Public School, ROORKEE
Class : Class 6
a piece of soft iron is taken, and then a insulated copper wire is spun around the piece of soft iron about 100 times. now a battery is connected to the copper wire.the copper wire works with the help of a dry cell(DC).

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ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Subject :NSO    Class : Class 8

Ans 1:

swayam agrawal from Udgam school for children, Ahmedabad
Class : Class 8
An eukaryotic cell is a cell which is properly developed and well developed nucleus.It has a membrane around it called the nuclear membrane which separates it from the cytoplasm of the cell.The DNA is present in the nucleus.In case of prokaryotic cell there is scattered nuclear region called nucleoid region lacking a nuclear membrane.

Ans 2:

Mayank Patel from Maharaja Agarsen Public School , Ghaziabad
Class : Class 8
the nucleus which have it nucler membrane is called eukaryotic

Ans 3:

Pratek Kashyap from St. Anthony's Secondary School, Faridabad
Class : Class 8
A cell having a proper nuclear membrane and a well defined and clearly visible nucleus is called an eukaryotic cell.

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Lakshya Garg from DMI, Meerut
Subject :NSO    Class : Class 6

Ans 1:

Rohan from The Shri Ram School, New Delhi
Class : Class 6
because the earth is an upside down magnet the south pole is up and north pole is down.

Ans 2:

YAGYASHA RASTOGI from PRESIDIUM INDIRAPURAM, Ghaziabad
Class : Class 7
As the north pole of the earth's magnet is the earth's geographical south pole this is why a compass always show the correct direction

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MITHILESH MANOHAR MADKE from YAVATMAL PUBLIC SCHOOL YAVATMAL, Yavatmal
Subject :NSO    Class : Class 5

Ans 1:

Ashmita Choudhury from Delhi Public School Noida, Noida
Class : Class 8
Predation of carnivores

Ans 2:

Joshika from Bombay Scottish School, Mumbai
Class : Class 7
C

Ans 3:

Daksh Rajesh Lolienkar from Doha Modern Indian School, Doah Qatar
Class : Class 5
the answer is c predatation by carnivores

Ans 4:

Sobia khan from Sardar Patel Vidyalaya, New Delhi
Class : Class 7
ans is 'c' = predation by carnivores

Ans 5:

Soundharya from ISWK, Muscat
Class : Class 8
a (supply of food)

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Pramit Bhattacharjee from Billabong High International School, Mumbai
Subject :NSO    Class : Class 5

Ans 1:

Sobia khan from Sardar Patel Vidyalaya, New Delhi
Class : Class 7
We can remove soluble impurities from water by evaporation and decantation.

Ans 2:

Tanvi Ritisha Dash from delhi public school bangalore east, Bengaluru
Class : Class 6
by evaporation and distillation

Ans 3:

Abhideep Jain from Delhi Public School, Amethi
Class : Class 7
By boiling it

Ans 4:

MITHILESH MANOHAR MADKE from YAVATMAL PUBLIC SCHOOL YAVATMAL, Yavatmal
Class : Class 5
yes,we can removesoluable impurites from water

Ans 5:

Soundharya from ISWK, Muscat
Class : Class 8
We can remove soluble impurities of water by sedimentation and decantation.

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Pramit Bhattacharjee from Billabong High International School, Mumbai
Subject :NSO    Class : Class 5

Ans 1:

Soundharya from ISWK, Muscat
Class : Class 8
Metamorphic rocks are formed from sedimentary rocks and igneous rocks.

Ans 2:

Soundharya from ISWK, Muscat
Class : Class 8
Metamorphic rocks are formed from sedimentary rocks and igneous rocks.

Ans 3:

Satweek Pradhan from Pallavi Model School, Hyderabad
Class : Class 6
metamormorphosis means change. So metamorphic rocks and formed through igneous and sedimentary rocks. With time,heat and pressure the igneous and sedimentary rocks form into metamorphic rocks.

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Aman sahu from Arya Gurukul, kalyan
Subject :NSO    Class : Class 7

Ans 1:

Saniya Wasnik from Chanda Public School, Chandrapur
Class : Class 8
Ferrel's law is the law the wind is deflected to the right in the northern hemisphere and to the left in the southern hemisphere.

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shiva p from pallavi model school, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

Abhideep Jain from Delhi Public School, Amethi
Class : Class 7
Q1. How did diamond made? Ans. When coal is kept in very deep under the soil for thousands of years it refined and then in it form this is said as Diamond. Q2. How did red diamond made? Ans. When coal is kept in very deep under the soil for thousand of years it refined and then in this form ito is said as Red Diamond. Q3. How did transparent diamond made? Ans. When coal is kept in very deep under the soil for lakhs of years it refined and then in this form it is said as Transparent Diamond.

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