National Science Olympiad Forum By SOF Olympiad Trainer - Page 614
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Pranav Kannan from Phoenix Greens, Hyderabad
Subject :NSO    Class : Class 3

Ans 1:

Eklavya Gondule from DPS Bhilai, BHILAI
Class : Class 7
w4aestdryuvghibj

Ans 2:

Pranav Kannan from Phoenix Greens, Hyderabad
Class : Class 3

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Aneesh Rajput from LOTUS VALLEY INTERNATIONAL SCHOOL, NOIDA
Subject :NSO    Class : Class 4

Ans 1:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10
But what is the explanation?

Ans 2:

sanjana from NARAYANA E TECHNO , Chennai
Class : Class 8

Ans 3:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
Pls explainI agree with shreyansh2010

Ans 4:

shreyansh2010 from Prudence, New Delhi
Class : Class 7
Answer D look like correct too

Ans 5:

Siddharth Laxmisha from The Study Lecole Internationale, PUDUCHERRY
Class : Class 8
No, Answer D is not correct. They are talking about red, blue, and green lights not red, blue, and green pigments in a leaf. Red and blue lights are efficient in photosynthesizing and the green pigment is also efficient in photosynthesizing. Here, they are talking about lights, not pigments in a leaf.

Ans 6:

shreyansh2010 from Prudence, New Delhi
Class : Class 7
Got it as green color reflected thus will not be used for photosynthesis

Ans 7:

Mohhika Sharma from Delhi Public School Greater Noida, Greater Noida
Class : Class 7
What????!!How?????!!!Please answer!!

Ans 8:

vineet8026@gmail.com from dps, Doha
Class : Class 1
Thanks for the answer. ......

Ans 9:

vineet8026@gmail.com from dps, Doha
Class : Class 1
How???????

Ans 10:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Answer C is correct because Red and Blue light are absorbed and used for Photosynthesis . But in D it is written Green light is reflected ( correct ) but is used for Photosynthesis ( incorrect )

Ans 11: (Master Answer)

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

Ans 12:

Anushtubh Ashish Sonawane from Blue Ridge Public School, Pune
Class : Class 5
howwwwwwwww pls 4my sanity tell me

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Rikhil Gupta from Christ Academy, Bengaluru
Subject :NSO    Class : Class 9

Ans 1:

from kv2, kalpakkam
Class : Class 9
i have got C

Ans 2:

Kingshuk Gupta from RN Podar school, Mumbai
Class : Class 9

Ans 3: (Master Answer)

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

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nageshrc228 from sangameshwar public school, Solapur
Subject :NSO    Class : Class 4

Ans 1:

anu from Haralur, Bengaluru
Class : Class 5

Ans 2:

ikshika kumar from MVN SCHOOL, FARIDABAD
Class : Class 7
B) West

Ans 3:

anu from Haralur, Bengaluru
Class : Class 5

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sheetal Gupta from ,
Subject :NSO    Class : Class 5

Ans 1:

Pragun goel from Venkateshwar International School, Delhi
Class : Class 8

Ans 2:

Swarit from Indian School Wadi kabir, Muscat
Class : Class 6
Observe the given diagram carefully which shows a reflex arc. The diagram is show a finger touching the flame of the burning candle. The Sensory Neuron P takes the message of the burning finger to the Relay Neuron R in spinal cord. The Motor Neuron Q takes the message from the Relay Neuron R to the related muscle to act accordingly and pull the finger away. Now, if the orientation of Motor Neuron Q is changed (red arrow) and made as that of Sensory Neuron P, that means message from Motor Neuron Q will go from Muscle to the Relay Neuron R. Now, let’s check the following options to see what will happen: A.All voluntary movements of body including reaction to heat will stop. ----- Incorrect. Reaction to heat is an involuntary reflex response. It will stop if the orientation of Motor Neuron Q is changed. But voluntary movements of the body, which are in control of our brain, will go on. B.The sensory receptor will not get stimulus from the candle. ----- Incorrect. The orientation of Sensory Neuron P is still the same, so sensory receptors in spinal cord will continue to get the stimulus of heat from the candle. C.The motor organ will not be able to get instructions from the spinal cord. ----- Correct. The orientation of Motor Neuron Q has been changed, so instruction from spinal cord will not reach the motor organ (muscle). It will go from muscle to the spinal cord instead. D.None of these ----- Incorrect. Hence, the right answer is Option C.

Ans 3:

Siddhant Singhania from AGCS purulia, Puruliya
Class : Class 7

Ans 4:

HIMANISH BASU from APS BANGALORE , Bangalore
Class : Class 7

Ans 5:

Swarit from Indian School Wadi kabir, Muscat
Class : Class 6
this question is so hard

Ans 6:

Yash Tulshyan from Sterling school, New Mumbai
Class : Class 5

Ans 7:

Khushie from Gdgps gurugram, Gurgaon
Class : Class 5
C is correct

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sheetal Gupta from ,
Subject :NSO    Class : Class 5

Ans 1:

Khushie from Gdgps gurugram, Gurgaon
Class : Class 5
C

Ans 2:

SHAURYA SINHA from GREEN FIELDS SCHOOL , NEW DELHI
Class : Class 5
Ans- C

Ans 3:

JOVITA MERIN JOBI from BHAVANS VIDYA MANDIR ELAMAKKARA, KOCHI
Class : Class 5
The answer is C Because Tadpoles breath through gills but gills are not given in the grid

Ans 4:

Manasvi Nagpal from blooming dales international school, sri ganganagar
Class : Class 5
ccccccccccccc

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Ankush Ghosh from DPS, Doha
Subject :NSO    Class : Class 5

Ans 1:

SHREYAS ANANDHAN from Phoenix Greens International School, Hyderabad
Class : Class 6
b

Ans 2:

Prisha Shah from Euroschool Airoli, Mumbai
Class : Class 6

Ans 3:

Karan Chavan from GIIS,Chinchwad, Pune
Class : Class 5
b

Ans 4:

Nishkarsh Sharma from Podar International School, Ahmedabad
Class : Class 5

Ans 5:

Prisha Shah from Euroschool Airoli, Mumbai
Class : Class 6
The explaination of this question is not complete.SOF please edit it.

Ans 6:

Karan Chavan from GIIS,Chinchwad, Pune
Class : Class 5
b

Ans 7:

Srija Das from Sent Joseph Convent Chandannagar, Serampore
Class : Class 10
B

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Anmol kathar from deogiri global academy, aurangabad
Subject :NSO    Class : Class 6

Ans 1:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 10
in a much better way First we have to dig the ground. (v)| Then we spread sand on the floor of the pit so that the pit remains open for a longer time. (i)| Then we can add the waste we planed to throw in the pit. (vi) | We have to then cover with grass so that the pit remains closed. (iii) | Moisture is required for wastes to decompose. (iv) | We can later place red worms, as they are very good decomposers_ to speedthe decomposing proccess. (ii)|

Ans 2:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 10
First we have to dig the ground. (v) Then we spread sand on the floor of the pit so that the pit remains open for a longer time. (i) Then we can add the waste we planed to throw in the pit. (vi) We have to then cover with grass so that the pit remains closed. (iii) Moisture is required for wastes to decompose. (iv) We can later place red worms, as they are very good decomposers_ to speedthe decomposing proccess

Ans 3:

VIJAYA SREYAS B from NARAYANA OLYMPIAD SCHOOL KUKATPALLY, HYDERABAD
Class : Class 6
option B

Ans 4:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 10
in a much better way First we have to dig the ground. (v) Then we spread sand on the floor of the pit so that the pit remains open for a longer time. (i) Then we can add the waste we planed to throw in the pit. (vi) We have to then cover with grass so that the pit remains closed. (iii) Moisture is required for wastes to decompose. (iv) We can later place red worms, as they are very good decomposers_ to speedthe decomposing proccess. (ii)

Ans 5:

ADVAY BANSAL from LOTUS VALLEY INTERNATIONAL SCHOOL GURUGRAM, GURUGRAM
Class : Class 6

Ans 6:

Pavani Soni from VYDEHI , Bengaluru
Class : Class 8
B

Ans 7:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10

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Aparna praveen from Rajagiri, Ernakulam
Subject :NSO    Class : Class 4

Ans 1:

Dishita Santosh Walujkar from Nutan English School, Kurduwadi
Class : Class 7
A

Ans 2:

Arihant Kumar from Lawrence High School, Bengaluru
Class : Class 4
Why not D

Ans 3:

Abhineet Nandy from DPS Whitefield, Bangalore
Class : Class 9
The answer is [A]

Ans 4:

ikshika kumar from MVN SCHOOL, FARIDABAD
Class : Class 7
A) Ball ‘b’ had the greatest impact on the ground.

Ans 5:

Satvik Agrawal from Delhi Public School, bhopal
Class : Class 5
aaa aaa aaa

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Anmol kathar from deogiri global academy, aurangabad
Subject :NSO    Class : Class 6

Ans 1:

Videh Jain from Bluebells School International, Delhi
Class : Class 6
ans is also D

Ans 2:

HARSHAL KUTE from cambridge school buldhana, Buldhana
Class : Class 6
all are correct

Ans 3:

ttraj from KV IIT, Chennai, Chennai
Class : Class 3
D

Ans 4:

Saanvi from Canara CBSE, Mangalore
Class : Class 8
Answer is D

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