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Rushika gupta from apeejay school, Faridabad
Subject :NSO    Class : Class 5

A ship is made of iron but still it floats in water. This is because of its shape. A ship is hollow in the middle. When it is in water, the entire volume of the ship, including the hollow portion displaces water to make space for itself. The volume of water displaced is much more than the volume of iron in the ship. Therefore, the ship floats in water.
Which of these rules can be deduced from the above given passage?

A If the upthrust is more than the weight, the body sinks in water.
B If the weight is more than the upthrust, the body floats in water.
C If the upthrust is less than the weight, the body floats in water.
D If the weight is more than the upthrust, the body sinks in water.

Ans 1:

Shaurya Veer from Blooming Dales International School, Sri Ganganagar
Class : Class 9
that's true this is based on Archimedes principle:Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces. Archimedes' principle is a law of physics fundamental to fluid mechanics

Ans 2:

Kevin Frederick S from Stanes School - ICSE, Coimbatore
Class : Class 5
What is the meaning of upthrust and Archimedes' principle

Ans 3:

Ayush Banerjee from DAV Pune, Pune
Class : Class 3
Refer Archimedes principle.

Ans 4:

KRITHYA GUPTA from LOTUS VALLEY INTERNATIONAL SCHOOL, NOIDA
Class : Class 7

Ans 5:

Ayush Banerjee from DAV Pune, Pune
Class : Class 3
Refer Archimedes principle.

Ans 6:

Devabhrith from Delhi Public School Electronic City Bangalore, Bengaluru
Class : Class 8
Archimedes principle

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Rushika gupta from apeejay school, Faridabad
Subject :NSO    Class : Class 5

The heart is made up of muscle tissue. However, the tissue in the heart is different from the tissue in the leg. Infer the reason for the difference.

A The heart must beat all the time, so its tissue should be able to contract and relax continuously without getting tired.
B The leg is much larger than the heart, so the tissue in the leg muscle needs to contain larger cells.
C A person can voluntarily control contraction of heart muscles but not leg muscles.
D The heart muscle is surrounded by blood vessels, so the blood makes it look different from the leg muscle.

Ans 1:

UMANG from spring dale college, Lucknow
Class : Class 7
Answer is A because the heart has cardiac muscles that comes in involuntary muscles work on their own and they continue to beat without stopping . Unlike involuntary muscles like muscles in legs , arms etc. work on signals given by brain

Ans 2:

Manasvi Nagpal from blooming dales international school, sri ganganagar
Class : Class 5
OF COURSE ITS A

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Shayan Bari from Kendriya Vidyalaya, Katihar
Subject :NSO    Class : Class 6

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svayumbhu sharma from jodhamal public school, jammu
Subject :NSO    Class : Class 8

The force required to start an object sliding across a uniform horizontal surface is larger than the force required to keep the object sliding at a constant velocity. The magnitudes of the required forces are different in these situations because the force of kinetic friction

AIs greater than the force of static friction.
BIs less than the force of static friction.
CIncreases as the speed of the object relative to the surface increases.
DDecreases as the speed of the object relative to the surface increases.


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Admin fly from Ddssxxx, Ax
Subject :NSO    Class : Class 6

Ans 1:

S Sujan Chakravarthi from CLM Sishya OMR, Chennai
Class : Class 10
because all lay eggs

Ans 2:

Sruthi from Suguna International School, Coimbatore
Class : Class 6
Option C It is because all of them lay eggs.

Ans 3:

S Sujan Chakravarthi from CLM Sishya OMR, Chennai
Class : Class 10
option-c

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TRIYA SOUMIK NATH from SYMBIOSIS PRIMARY SCHOOL, PUNE
Subject :NSO    Class : Class 7

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Pratibha Gratus from dps north, Bangalore
Subject :NSO    Class : Class 4

Ans 1:

arjun gupta from st kabir public school, Chandigarh
Class : Class 4
A

Ans 2:

Shruthi from VIBGYOR, Mumbai
Class : Class 6

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Tanihq Nagirkar from SNBP, PUNE
Subject :NSO    Class : Class 8

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Sabhya Kumar from Suncity School, Gurgaon
Subject :NSO    Class : Class 7

Priya categorised animals on the basis of their respiratory organs. She made three groups of four organisms each. By mistake, she put one wrong member in each group. Identify it and select the correct option.
Group I : Ladybird, Silverfish, King crab, Cockroach
Group II : Arowana, Jellyfish, Sea-horse, Climbing perch
Group III : Krait, Stork, Porcupine, Gambusia

A Silverfish in group I should be interchanged with jellyfish in group II.
B Climbing perch in group II should be replaced with pangolin.
C Ladybird in group I should be interchanged with Gambusia in group III.
D King crab in group I should be replaced with locust.

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Snehal Akolkar from vikhe patil, Pune
Subject :NSO    Class : Class 4

Ans 1:

UMANG from SPRING DALE COLLAGE, Lucknow
Class : Class 8
Answer is option A.

Ans 2:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
answer is a

Ans 3:

UMANG from SPRING DALE COLLAGE, Lucknow
Class : Class 8
Answer is option A.

Ans 4:

UMANG from SPRING DALE COLLAGE, Lucknow
Class : Class 8
Answer is a

Ans 5:

UMANG from SPRING DALE COLLAGE, Lucknow
Class : Class 8
Answer is option A. MUFFLER

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