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Spandan Pradeep Pathare from Takshila school , Ahmednagar
Subject :NSO    Class : Class 7

Ans 1:

AISHA from K.V.No.-1,A.F.S.,SEC.-14, GURUGRAM
Class : Class 7
B

Ans 2:

Arav saraf from lotus valley international school, NOIDA
Class : Class 7

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SOURADEEP SHARMILA MANDAL from KENDRIYA VIDYALAYA IISC, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

Shantaneel Sarkar from Delhi Public School, Nagpur
Class : Class 6

Ans 2:

Shantaneel Sarkar from Delhi Public School, Nagpur
Class : Class 6
Correct Answer is D - 5

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CHIRAG KHORIA from EVERGREEN PUBLIC SCHOOL, MAYNAGURI
Subject :NSO    Class : Class 5

Ans 1:

from , rajahmundry
Class : Class 2
Ans A When playing a musical instrument that is a closed-end air column, such as the bottles in this activity, the pitch of the note that is made depends on the length of the air column. In other words, the pitch depends on how much water has filled up the bottle and how much empty space remains. This is because the pitch of the sound we hear depends on the frequency of the sound wave that can be created within the bottle's air. The shorter the air column (that is, the shorter the height of the air in the bottle) the higher the frequency. And the higher the frequency the higher the perceived pitch. This is why the empty bottle should have produced a sound wave with a lower frequency than the others and the bottle that was nearly full (three quarters full) should have made the highest pitch.

Ans 2:

Swastik from st marys school, new delhi
Class : Class 6
Ans A When playing a musical instrument that is a closed-end air column, such as the bottles in this activity, the pitch of the note that is made depends on the length of the air column. In other words, the pitch depends on how much water has filled up the bottle and how much empty space remains. This is because the pitch of the sound we hear depends on the frequency of the sound wave that can be created within the bottle's air. The shorter the air column (that is, the shorter the height of the air in the bottle) the higher the frequency. And the higher the frequency the higher the perceived pitch. This is why the empty bottle should have produced a sound wave with a lower frequency than the others and the bottle that was nearly full (three quarters full) should have made the highest pitch.

Ans 3:

harry potter from Hogwarts school of witchcraft and wizardry , london
Class : Class 5
ha you have copied

Ans 4:

likith from Delhi Public School International School, Singapore
Class : Class 7

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aikya from psbn, bangalore
Subject :NSO    Class : Class 6

Symptoms of two diseases are given. I. Swollen, bleeding gums, loose teeth and aching joints.
II. The patient looks pale, gets tired quickly and suffers from loss of appetite.
Identify the two diseases from the given symptoms, and select the correct option.

AI. Pellagra, II. Beri beri
BI. Scurvy, II. Rickets
CI. Beri beri, II. Scurvy
DI. Scurvy, II. Anaemia


FIRST=symptoms of scurvy,caused by lack of vitamin CSECOND=symptoms of anaemia ,caused by lack of ironbye.

Ans 1:

Kushal from Chirec, Hyderabad
Class : Class 7
The answer is d

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Aksh singh from The asian school, Dehradun
Subject :NSO    Class : Class 7

Read the given statements and select the correct option.
Statement 1: Forests prevent soil erosion.
Statement 2 : Canopy formed by crown of leaves of forest trees reduces the force and speed of raindrops.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true but statement 2 is false.
D Both statements 1 and 2 are false.


Ans 1:

medhamshu8 from sri chaitanya, hyderabad
Class : Class 8
statement 1:the roots of the trees of the forest hold the soil and prevent soil erosion. (true) statement 2:in forest the leaves of the trees overlap each other and form a canopy and when the rain falls on the leaves the leaves absorb the rain water and some water flows from the branches and remaining water fall on the small shrubs and it absorbs the water and the left over water is then absorbed by the soil so no floods will occur in the forests. (true) option B:statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1

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aikya from psbn, bangalore
Subject :NSO    Class : Class 6

Ans 1:

Falguni from Navkis, Bangalore
Class : Class 7
Yeah,the answer is D

Ans 2:

Dheeraj Thriyambak M from Sri Sankara Senior Secondary School Adyar, Chennai
Class : Class 6
Option A states that I and IV are reversible changes????!!?!?!?!?

Ans 3:

Dheeraj Thriyambak M from Sri Sankara Senior Secondary School Adyar, Chennai
Class : Class 6
IV is burning of wood which is an irreversible change. How can it be D??

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Vedika from bal bharti public school, Delhi
Subject :NSO    Class : Class 4

Ans 1:

Baibhab Mishra from City Pride, pune
Class : Class 4
Hydroelectricity can be used in things like fans. Here , Electrical energy(Hydroelectricity)----->changes into----->Mechanical energy(fan)

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PARNIKA SINGH from GYAN GANGA EDUCATION ACADEMY, RAIPUR
Subject :NSO    Class : Class 6

Read the given statements and select the correct option.
Statement 1: Groundwater is generally safe for drinking.
Statement 2: Groundwater is free from suspended impurities.

A Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.
C Statement 1 is correct but statement 2 is incorrect.
D Both statements 1 and 2 are incorrect.

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Aditya Sai Vemparala from Amanora school, Pune
Subject :NSO    Class : Class 7

Pain due to a wasp sting can be reduced by rubbing (i) solution while pain due to a bee sting can be neutralised by applying (ii) on the skin. Substance (iii) is used for making pickles and when it is mixed with (ii), it undergoes a (iv) change to evolve (v) gas.
(i), (ii), (iii), (iv) and (v) are respectively

A Formic acid, sodium carbonate, vinegar, chemical and CO2
B Vinegar, calamine solution, vinegar, chemical and CO2
C Soap, vinegar, sodium bicarbonate, physical and H2
D None of these.

Ans 1:

Mrittika Roy from Delhi Public School Mahendra Hills, Secunderabad
Class : Class 2
there are only 4 items in each option, but there are five blanks

Ans 2:

Saanvi from Dehli Public School , Gurugram
Class : Class 4

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Chanpartap from The British Co Ed High School , Patiala
Subject :NSO    Class : Class 7

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