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Saanvi Santaji Yadav from Lead School mogavali , Mangoan
Subject :NSO    Class : Class 2

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Please visit our website- http://www.sofworld.org or call us at  0124-4951200 (Landline No), 9312680855, 9312680857 (Mobile:).


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Mridul Jain from Shishukunj International School Indore, Indore
Subject :NSO    Class : Class 5

A student investigates erosion using four kinds of equal amount of earth materials: top soil, clay, sand and soil planted with grass. Equal amounts of water is allowed to flow from the surface of each type of earth material. The water is then separated out from the earth material with the help of a filter. The given figure shows the amounts of earth material that are collected. The results of this investigation best support which conclusion?


ATop soil is easily eroded.
BSand has a smooth texture.
CWater travels fastest through soil planted with grass.
DWater drains most quickly through clay.


Can you please explain.

Ans 1:

tanmay chaudhry from BAL BHAVAN PUBLIC SCHOOL, New Delhi
Class : Class 4
answer a soil erosion will occur

Ans 2:

shreedhar from the shri ram school, delhi
Class : Class 5
top soil is easily eroded (a)

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Gokulakrishnan from Rosemary public school, Tirunelveli
Subject :NSO    Class : Class 9

Ans 1:

Advait talnikar from Dhruv Global School, Sangamner
Class : Class 6
Ans. is A sublimation

Ans 2:

Gokulakrishnan from Rosemary public school, Tirunelveli
Class : Class 9
The answer is A.sublimation

Ans 3:

Saanvi Rao from Shree Krishna International School, Vapi
Class : Class 9
Sublimation because it is the process of change of state of matter from solid to gas without changing into liquid state.

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Abhineeth Maity from Bright Riders School, Abu Dhabi
Subject :NSO    Class : Class 9

Which of the following statements about the given experimental set-up is/are incorrect?

I. It is used to separate a mixture of two or more miscible liquids for which the difference in boiling points is more than 25 K.
II. It is used for the separation of different gases from air.
III. It is used to separate acetone and water from their mixture.
IV. It is based on the principle of repeated cooling and condensation of vapours by providing surface for the vapours.

A I only
B III and IV only
C I and II only
D I and III only


Ans 1:

Suvan Shee from Chirec public school, Hyderabad
Class : Class 9
yes it 1 and 3 only

Ans 2:

Gokulakrishnan from Rosemary public school, Tirunelveli
Class : Class 9
3 and 1 only

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Aniket Hedde from Podar International School, Nanded
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is D

The electonic configuration of manganese (atomic number=25) is 1s2 2s2 2p6 3s2 3p6 3d5 4s2


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Neha Sharma from St Patricks, Bhatinda
Subject :NSO    Class : Class 4

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Ayush Anand Sharma from GEMS international school , Gurgaon
Subject :NSO    Class : Class 6

Which of the following statements is correct ?
(i) The response of plant towards the Earth is called phototropism .
(ii) The ability of certain animals to blend with the surrounding, making them difficult to spot is called camouflage.
(iii) Whales and dolphins breathe in oxygen from water through gills.
(iv) Hibernation is an adaptation for escaping hot weather.

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


escaping hot weather is called aestivation . hibernation is escaping from cold weather .

Ans 1:

Daksh Kumar from GCIS, Bangalore
Class : Class 6
THE CORRECT ANSWER IS A

Ans 2:

Vidwat Amal from Podar International School , Anand
Class : Class 6
statement 4 is wrong and none of the options is correct as response of plants towards earth is called geotropism

Ans 3:

KEERTHANA SHIBU from INDIAN SCHOOL GHOUBRA, Oman
Class : Class 6
sof wrong ans there should be option like:only ii is correct

Ans 4:

MInnal Senthil from Prakriya, Bangalore
Class : Class 5
not a because The response of plant towards the sun is called phototropism

Ans 5:

santosh katiyar from narayana vidhyalayam, Nagpur
Class : Class 7
THE CORRECT ANSWER IS (A)

Ans 6:

Dipam from Podar International School, Aurangabad
Class : Class 8
YES The correct answer is (A).

Ans 7:

Manvi Mundepi from Montfort School Roorkee, Roorkee
Class : Class 8
I WANT EXPLAINATION

Ans 8:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Class : Class 7
The answer is wrong

Ans 9:

Karthik from Euro, Bengaluru
Class : Class 6
sof is wwwwwwwwwwwwwwwwwwwrrrrrrrrrrrrrrrrrrrrrrrrrroooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnngggggggggggggggggggggggggggggggggggggggggggg

Ans 10:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 6
Statement 4 is wrong because hibernation is done to escape cold weather not hot , so SOF is wwwwwwwwwwrrrrrrrrrrrrrrrrrrrooooooooooooooonnnnnnnnnnnnnnnngggggggggggggggggggg

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VAIBHAV KALVAKOTA from THE LEXICON INTERNATIONAL SCHOOL WAGHOLI, PUNE
Subject :NSO    Class : Class 8

Ans 1:

VAIBHAV KALVAKOTA from THE LEXICON INTERNATIONAL SCHOOL WAGHOLI, PUNE
Class : Class 8

Ans 2:

Anirudh from Kendriya Vidyalaya Kanjikode, Palakkad
Class : Class 8
All the properties friction are in use. Hence, the correct one option 'D'.

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VAIBHAV KALVAKOTA from THE LEXICON INTERNATIONAL SCHOOL WAGHOLI, PUNE
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is C.


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shaurya chitriki from delhi public school north, bangalore
Subject :NSO    Class : Class 3

Ans 1:

Mohi from Vibgyor, Bangalore
Class : Class 1
B) 2 and 3

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