National Science Olympiad Forum By SOF Olympiad Trainer - Page 299
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Prithwanko Ghosh from Kendriya Vidyalaya IIT Kanpur, Kanpur
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

A

The animal shown in the image is a sheep and it's fleece is used for making woolen socks and gloves.


Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

A

The animal shown in the image is a sheep and it's fleece is used for making woolen socks and gloves.


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Kanishk Mukherjee from BDM International, Kolkata
Subject :NSO    Class : Class 6

Ans 1:

SOUVAGYA SAHA from De Nobili School, DHANBAD
Class : Class 10
the current starts flowing from positive end to negative end in a closed circuit and in this case , current first gets divided and passes through Q and R and then the current again gets add up and passes through p. so due to the greater flow of current through P it is more brighter.

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D

When the key K is closed, an electric current starts flowing in the circuit . The current which passes through bulb P gets divided  in bulbs Q and R. For the identical bulbs , the brightness will depend upon the current flowing through the bulbs,So P will glow brighter than Q and R .


Ans 3:

malhar thorve from city internqtional school, satara road, pune
Class : Class 6

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Kanishk Mukherjee from BDM International, Kolkata
Subject :NSO    Class : Class 6

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

B

Transparent objects allow the light to pass through it completely , while the translucent passes the light partially .

An object is categorised as opaque if it completely blocks the light falling on it.

Hence, B is the correct option.


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Pratheek from Null, Null
Subject :NSO    Class : Class 6

Soham was given a mixture of camphor, iron filings, sawdust and salt.
Which of the following represents the correct sequence of steps to separate all the components of this mixture?

A Winnowing, filtration, separating funnel and magnetic separation
B Sedimentation and decantation, heating, filtration and evaporation
C Magnetic separation, heating, filtration and evaporation
D Sedimentation and decantation, handpicking, filtration and evaporation

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harry potter from Hogwarts school of witchcraft and wizardry , london
Subject :NSO    Class : Class 5

Refer to the given flow chart and select the incorrect option.


APart P will help a student think, learn and recall her lessons.
BPart Q will help a child to learn the art of riding a bicycle.
CPart R controls our breathing and heartbeat even when we are asleep.
DPart Q will help a person retract his hand when touched by a hot object.


now this is wron' 'cause i, option D it is written part Q but in the solution it's written par' Q plz correc' thi'

Ans 1:

harry potter from Hogwarts school of witchcraft and wizardry , london
Class : Class 5
wrong!!!!!!! BLUNDER BY SOF!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 2:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
wrong question

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Shubhi Vats from Kendriya Vidyalaya Ordnance Factory Chanda, Bhadrawati
Subject :NSO    Class : Class 7

Ans 1:

Rithvik from BVM Global, Chennai
Class : Class 8
exactly Arav . they should give it clearly. its to small. and they should mention in synopsis about various parts...

Ans 2:

Arav saraf from lotus valley international school, NOIDA
Class : Class 7
not available to identify

Ans 3:

ABCDE from admin, Noida
Class : Class 4

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chittaranjan kar from MLZS, Jaipur
Subject :NSO    Class : Class 6

Which of the following statements are correct?
(i) The colour of light will affect the characteristics of the shadow.
(ii) If light is allowed to pass through a piece of muslin cloth, a lighter shadow will be formed.
(iii) The magnetic properties are induced into an iron bar till the magnet is kept near it.
(iv) Bulb has only one terminal to connect the filament with the circuit.

A (i) and (iv) only
B (i), (ii) and (iii) only
C (ii) and (iii) only
D (iii) and (iv) only


Color of shadow will change with color of light. So, (i) is also correct.

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

Colour of an object doesn' t affect the colour of its shadow .It is faint and dark depending upon the amount light falling on the screen.

The iron rod behaves like a magnet so long as it is kept near the magnet. When the magnet is removed, the iron rod loses its magnetic property.

An electric bulb has two two terminals.


Ans 2:

Rishit goyal from St Peter's College, Agra
Class : Class 4

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Sai shankar S from geethanjali vidyalaya, Bangalore
Subject :NSO    Class : Class 7

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k tagore from montessori school, KURNOOL
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Please visit our website: www.mtg.in

Or reach us on

Telephone

0124-6601200

Email
info@mtg.in


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Amrik Pal from Kendriya Vidyalaya DRDO, Bangalore
Subject :NSO    Class : Class 6

Class teacher gave four different samples of fibres to four students. Ria has fibre H, which is obtained from plant that grows best in alluvial soil in warm and humid climates. Fibre I given to Sumit gives smell of burning hair on being burnt and has ability to trap air and heat, while fibre J given to Kanika, is a fibre obtained from an insect. Fibre K given to Rahul burns with smell of burning plastic. Identify the fibres H, I, J and K and select the correct option regarding them.

AFibre H is the cheapest vegetable fibre and is also known as golden fibre.
BFibre I is obtained from passion vine and can be worn both in summers and winters.
CFibre J does not absorb water at all hence is used in making raincoats.
DFabric made of fibre K can absorb sweat, thus is comfortable to wear in hot and humid weather.


A

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