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ATUL SANJEEV from Indian school Ghubra, Muscat
Subject :NSO    Class : Class 5

Ans 1:

Deepayan Das from South Point High School, Kolkata
Class : Class 6
It is not c because new plants can rise by vegetative reproduction which are not by seeds.It is by roots, stem or leaves. what, in case of byrophyllum plant.

Ans 2:

Shruthi Murugaiyan from Kendriya Vidyalaya IIT, Chennai
Class : Class 5

Ans 3:

CrazyRIDZ from Samhita , Bengaluru
Class : Class 6
but seeds can reproduce through stem , leaves , and root too , can't they ???

Ans 4:

Mohhika Sharma from Delhi Public School Greater Noida, Noida
Class : Class 5
Deepayan and Sumit are right..of course it is d, if there are no leaves the plant will die, how is it going to reproduce then??

Ans 5:

Manasvi Nagpal from blooming dales international school, sri ganganagar
Class : Class 5
WE HAVE READ THAT THEY CAN GROW WITHOUT FLOWERSIF THEY HAVE NOT FLOWERS THEY GROW IN A DIFFERENT MANNERVERY STUPID OF SOFSO MANY ERRORSWHAT EVER CORRECT OPTION IS D

Ans 6: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is C

Flower changes into fruits and fruit bears seeds. Seeds give rise to new plants when sown into soil.


Ans 7:

Sumit Singhal from Cambridge Court World School, JAIPUR
Class : Class 7
but in some plants ther is no flower then also they can reproduce in a different manner

Ans 8:

shalini mittal from DPS Greater Noida, Greater noida
Class : Class 4
I think it is seed only because if the other parts will no be there than how the previous plant will grow

Ans 9:

Nitya from PPSD, Dombivali
Class : Class 5
Think the correct ans'rs C Cause a flower changes into a fruit in the fruit then bears seads which give rise to new plants on being down in soil. That's what I think don't know if it is right!!!

Ans 10:

Rudra Tripathi from DPS ASANSOL, Asansol Burdwan
Class : Class 5
I think answer is (C) as flowers changes into fruit and fruit changes into seed.

Ans 11:

Abhijato Chatterjee from Bharatiya Vidya Bhavan, Kolkata, kOLKATA
Class : Class 6
the answer is d as many plants don't have flowers but still reproduce. Without the leaves, the plants can't make food.

Ans 12:

Shubh Neema from St Norbert seniors secondary school, Indore
Class : Class 5
Stem is also correct for some plants like mint ,

Ans 13:

Piyush Kumar Pruseth from Sri Aurobindo Integral Education and Research Centre, Rajgangpur
Class : Class 5
Flower attract the insects for pollination,so the answer is C

Ans 14:

KONDURU TEJESH from Sri chaitanya international school, Bangalore
Class : Class 4
i pressed option c but its incorrect

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Anshuman Mishra from kv no 3, Bhubaneswar
Subject :NSO    Class : Class 6

Four rods of equal length and thickness but of different materials are coated with wax in the same manner. They are fixed to a trough containing hot water. The given diagram illustrates what happens to the wax on each rod after five minutes.

What can you conclude from the given diagram?
(i) The aluminium rod conducts heat better than the brass rod.
(ii) The aluminium rod conducts heat better than the copper rod.
(iii) The glass rod conducts heat better than the copper rod.
(iv) The wax on the copper rod melts faster than the wax on the brass rod.

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


Ans 1:

Manvi Mundepi from Montfort School Roorkee, Roorkee
Class : Class 8
ACCORDING TO ME THE CORRECT ANSWER IS B , FIRST WE HAVE TO UNDERSTAND THE PICTURE AND THEN ANSWER

Ans 2:

Ashee Srivastava from APEEJAY SCHOOL NOIDA , NOIDA
Class : Class 7
The answer is 'a' because the rods are fully coated with wax, those rods which have less wax are good conductors because the wax melted and fell from it.

Ans 3:

Taanvi Deenadayaalu from National Public School , Bangalore
Class : Class 7

Ans 4:

Dheeraj Thriyambak M from Sri Sankara Senior Secondary School Adyar, Chennai
Class : Class 6
it cannot be as you have said because the wax is dripping from the glass rod whereas on the copper rod, it is as it was first placed. And they will not give us a diagram if they are going to ask something not related to it.So, the answer must be B and not A.

Ans 5:

A S Neeraj from K V 2, Chennai
Class : Class 6

Ans 6:

Arkaprabho Sau from Griffins International School, Kharagpur
Class : Class 7
It must be 'B' not 'A'

Ans 7:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 6
b is the answer

Ans 8:

Dheeraj Thriyambak M from Sri Sankara Senior Secondary School Adyar, Chennai
Class : Class 6
Sorry for giving the wrong information. At the beginning even I thought the answer was B.If you click the solution button, it says that since the copper rod has the least amount of wax on it, it is the better conductor as all the other wax on it has melted and fell down. That is why the answer is A not B

Ans 9:

BHAVYA JHA from GLOBAL CITY INTERNATIONAL SCHOOL, BANGALORE
Class : Class 6
I too agree with you .It's B and not A

Ans 10:

gayathri from NPS, Bengaluru
Class : Class 3
the wax has been applied all over the rod. copper has the least amount of wax on it. So it is the best conductor of heat whereas the glass rod has the most amount of wax thus it is the weakest conductor of heat.Thus,the option "A" is the correct answer

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from ,
Subject :NSO    Class : Class 1

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vanshaj shah from tapti valley international school , surat
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is D

In transverse wave, vibration of a wave is perpendicular to its direction of propagation of wave.


Ans 2:

Mani Gupta from Carmel Convent School, Faridabad
Class : Class 9
The correct answer is D. In a transverse wave the direction of the movement of the particle is perpendicular to direction of motion of the wave. So, over here, when we move the end Q from left and right , it will produce a transverse wave,. You can check it by observing it from the top.

Ans 3:

Sriram Venkatkrishnan from Basava International School, New Delhi
Class : Class 7

Ans 4:

Rishith Sunil from BVM Global BHS, Chennai
Class : Class 8

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Sainavaneet from Global Indian , Bangalore
Subject :NSO    Class : Class 7

Ans 1:

YASH SAH from DELHI PUBLIC SCHOOL MIS DOHA, Doha
Class : Class 8

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is A.

Sugar syrup is neutral and hence the colour of blue litmus and red litmus remains unchanged. Tamarind juice is acidic, so blue litmus turns red but red litmus does not change its colour. Lime water and soap solution are basic in nature which turn red litmus blue whereas blue litmus remains unchanged.


Ans 3:

Aryan Ghatti from Mount saint mary school , Delhi
Class : Class 8

Ans 4:

Mayank Mili from Delhi Public School, Golaghat
Class : Class 8
Answer is A

Ans 5:

CHIRAG SHAH from Lilavati Poddar , Mumbai
Class : Class 8
yeah the answer is a

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Lokesh Chhabra from Lilavatibai podar high school, Mumbai
Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Fish Y will be least affected as it is camouflaging with the sea weeds. Fish Y can easily escape from the predator by blending with the surrounding environment.


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VV Souri from LITTLE FLOWER SCHOOL , UPPAL HYDERABAD
Subject :NSO    Class : Class 7

Ans 1:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 9
why?

Ans 2:

Hritvi from Podar International School, Mumbai
Class : Class 7
There is no proper solution for this question which will make it more confusing as everyone will have different opinions in this question.

Ans 3:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 8
B should be the correct answer I think

Ans 4:

JANYA CHANGELA from UDGAM SCHOOL FOR CHILDREN , Ahmedabad
Class : Class 8
I THINK THAT B IS ONLY THE CORRECT ANSWER

Ans 5:

Anish from Vibgyor, Pune
Class : Class 8
I think b is correct because there is no solidification

Ans 6:

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

Ans 7:

Debarka Das Gupta from Silchar Don Bosco School, Silchar
Class : Class 7
i think b is the correct answer

Ans 8:

pankaj srivastava from K R mangalam world school, vaishali
Class : Class 6
b is the correct answer

Ans 9:

arjun from the bishops school camp , pune
Class : Class 8
at 4 degree celsius water starts expanding and 'x' shows the same the room temperature might have been near or equal to the freezing point of water(eg room temperature of regions like arctic and antarctic)

Ans 10:

Mohinder singh from Sacred heart convent school, Ludhiana
Class : Class 7
B is the correct answer

Ans 11:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 8
Also freezing and melting point of water is 0 degrees celsius

Ans 12:

kashvi from Amity, noida
Class : Class 7
Three states - gas , liquid & solid When hot water temp is going down it will be ultimate become solid ie ice But before becoming ice temp will stagnant for some time where in both states liquid & solid co-exist==> some part of liquid is in ice form. X is the same state where in solid and liquid will co-exist. Hence option 4 is correct(solidification& evaporation) Note: Could not attach gif .It would have made it more clear.

Ans 13:

Pisal Dhruv from Veer Bhagat Singh International School, Mumbai
Class : Class 7
i think b is the correct answer

Ans 14:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 8
It cools towards room temperature so it does not freeze

Ans 15:

Bhumi Chheda from SVKM J V Parekh International School, Mumbai
Class : Class 8
i think b is correct

Ans 16:

Sanidhya Kapoor from Shikshantar, Gurugram
Class : Class 8
It is cooling towards room temperature so it does not solidify since the freezing point is below room temperature.

Ans 17:

Hritvi from Podar International School, Mumbai
Class : Class 7
I think B is the correct answer because there is no solidification taking place or else the water would have turned into ice. plus no solidification can take place when water is at room temperature.

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AHANA BAG from DELHI PUBLIC SCHOOL JOKA SOUTH KOLKATA, KOLKATA
Subject :NSO    Class : Class 3

Ans 1:

nirvi pal from jasudben ML School, mumbai
Class : Class 4
okkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk

Ans 2:

kalra Shaleen from Jalandhar, Jalandhar
Class : Class 5
b

Ans 3:

AHANA BAG from DELHI PUBLIC SCHOOL JOKA SOUTH KOLKATA, KOLKATA
Class : Class 6

Ans 4:

suhas from vibgyor, bangalore
Class : Class 4
The answer is gibbous moon.

Ans 5:

Aditri Dixit from TCIS, Bangalore
Class : Class 3

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Swarnava Pal from Vivekananda Mission School, Haldia
Subject :NSO    Class : Class 4

Ans 1:

Laiba from Olive International School , Doha
Class : Class 4
Yes. A.

Ans 2:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 8
A

Ans 3:

ANAY GUPTA from CMS KANPUR ROAD LUCKNOW, LUCKNOW
Class : Class 5
a is right

Ans 4:

Aaryaman Pradhan from De paul School , Berhampur
Class : Class 5
a

Ans 5:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 8
A

Ans 6: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is A.

Both plants ‘c’ and ‘d’ bear fruits. This means they are flowering plants as only flowers change into fruits. Plant ‘c’ grows in water i.e., it is an aquatic plant but plant ‘d’ does not grow in water thus, it is a nonaquatic plant. Hence 'W' and 'X' represent plant ‘c’ and ‘d’ respectively.


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Dhruvan G from Indian School al Ghubra, Muscat
Subject :NSO    Class : Class 8

There are two different solutions in set up P and Q as shown in figure. The bulb in the set up P glows more brightly as compared to that of the set up Q. What are the possible causes for this?

(i) The connections of the circuit Q may be loose.
(ii) The liquid in Q may have small conductivity.
(iii) Liquid in P is equivalent to a battery while liquid in Q is equivalent to a cell of the battery of liquid P.

A Only (i) and (ii)
B Only (ii) and (iii)
C Only (i)
D Only (ii)


I don't understand (iii)

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is B

In given figures, both the circuits are tightly connected and both the liquids conduct electricity because both the bulbs are glowing. The bulb in the set up P glows more brightly as compared to that of the set up Q might be because of any of the two possibilities:

1. The liquid in Q may have small conductivity. 

2.  Liquid in P is equivalent to a battery while liquid in Q is equivalent to a cell of the battery of liquid P. 


Ans 2:

Student from School, City
Class : Class 8
How can a liquid be equal to a battery and another liquid be equal to *its* cell?

Ans 3:

Chatresh ramasai gudi from Bgsnps , Bangalore
Class : Class 8
It’s not mentioned about tightness of the circuits.

Ans 4:

Student from School, City
Class : Class 8
How can a liquid be equal to a battery and another liquid be equal to *its* cell?

Ans 5:

Ankit kumar Jha from Ryan International School , Ghaziabad
Class : Class 9
but how do we know that the circuit is conneced tightly???

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