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SANVI from D PS VADODARA, Vadodara
Subject :NSO    Class : Class 7

The polar bear has some adaptive features to live in extremely cold climate of polar regions.
Some are given in the box.

Select the correct adaptation values of the features P, Q and R from the following:
(i) Helps in catching the prey
(ii) Helps in high speed running
(iii) Insulates the body
(iv) Makes it a good swimmer
(v) Reduces heat loss
(vi) Makes it walk on snow easily
(vii) Sensitive hearing

A P → (v), Q → (vii), R → (ii)
B P → (iv), Q → (iii), R → (i)
C P → (iii), Q → (v), R → (vi)
D P → (iii), Q → (i), R → (ii)


I have a question, how can small ears help in reducing heat loss?

Ans 1:

Pratyay Sarkar from South Point High School, Kolkata
Class : Class 7
Small ears have less blood vessels. Blood vessels help radiate heat from the body. So less blood vessels in the small ears help reduce heat loss.

Ans 2:

Pratyay Sarkar from South Point High School, Kolkata
Class : Class 7
P-(iii),Q-(v),R-(vi)

Ans 3:

Arnav Ranka from Gyan Bharati School, Saket, New Delhi
Class : Class 9
Big ears will have a comparatively more blood supply. So it will have more heat loss also.

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from Sri Chaitanya Techno School, Bengaluru
Subject :NSO    Class : Class 7

Ans 1:

Shriya Sreekrishna from BLUEBELLS SCHOOL INTERNATIONAL, New Delhi
Class : Class 7
The answer is option A, I think

Ans 2:

UTKARSH SAWARN from AIR FORCE SCHAOOL AMBALA CANTT, AMBALA CANTT
Class : Class 8
A OPTION

Ans 3:

Shayan Bari from Kendriya Vidyalaya, Katihar
Class : Class 7
Option A is the correct option.

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Tanmaya Sreenath from KIDZEE OXFORD BLOOM SCHOOL, KARAIKAL
Subject :NSO    Class : Class 3

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KSHITIJ BHATIA from St Francis De Sales, New Delhi
Subject :NSO    Class : Class 4

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UTKARSH SAWARN from AIR FORCE SCHAOOL AMBALA CANTT, AMBALA CANTT
Subject :NSO    Class : Class 7

Ans 1:

Gauri Chaturvedi from St Josephs Convent, Jabalpur
Class : Class 8
Answer is B

Ans 2:

MASTER UTSAV BHATTACHARYA from THE EMERALD HEIGHTS INTERNATIONAL SCHOOL, INDORE
Class : Class 8

Ans 3:

Prajith Kumaran from RCIS, Bangalore
Class : Class 7

Ans 4:

sujata from Rayan International school sanpada, Mumbai
Class : Class 7
answer is B

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from Sri Chaitanya Techno School, Bengaluru
Subject :NSO    Class : Class 7

Ans 1:

Shashi Shekar B S from Carmel School, BANGALORE
Class : Class 10

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from Sri Chaitanya Techno School, Bengaluru
Subject :NSO    Class : Class 7

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Anushka Srivastava from Cjm, Dehradun
Subject :NSO    Class : Class 6

Mark the incorrect statement.

A Melting of wax is a physical change while burning of wax in a candle is a chemical change.
B Metals expand on heating while contract on cooling. Both are physical changes.
C Composition of matter changes during a chemical change while it remains same during a physical change.
D High and low tides in sea are the examples of non-periodic changes while growth of a tree is a periodic change.


Ans 1:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Class : Class 7
Option d is correct right can anyone explain the correct answer given

Ans 2:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
Option D is incorrect

Ans 3:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 6
d

Ans 4:

SKIyer from CNS, Mumbai
Class : Class 6
D is the correct answer because the revolution of moon around the earth causes high tides and low tides and tree doesn't grow everyday.

Ans 5:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 6
Option d is correct

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Abhaid Goel from Indian School , Muladha
Subject :NSO    Class : Class 7

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from Sri Chaitanya Techno School, Bengaluru
Subject :NSO    Class : Class 7

Ans 1:

Abhaid Goel from Indian School , Muladha
Class : Class 9
Option C

Ans 2:

Abhaid Goel from Indian School , Muladha
Class : Class 9
Option C

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