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Radhika Gupta from Dps civil lines aligarh , Aligarh
Subject :NSO    Class : Class 4

A scientist observed a sudden increase in the number of algae in a lake over a few days. The reason behind it could be that ____________.

AWater cycle in the area got unbalanced
BElectronic wastes were being dumped in a nearby area
CA factory with heavy smoke discharge has been established nearby
DHeavy amount of chemical fertilisers were being used in a nearby field


Option d As heavy amount of chemicals fertilizers were being used in a nearby fiel

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D


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AKSHAJ SRIVASTAVA from MOUNT LITERA ZEE SCHOOL, Kanpur
Subject :NSO    Class : Class 8

Ans 1:

Ankit kumar Jha from Ryan International School , Ghaziabad
Class : Class 9
C is the answer

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Vaibhav Elisetti from sri chaitanya techno school bavdhan, Pune
Subject :NSO    Class : Class 5

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Aditya Ananda Bharali from Chirec International School,Gachibowli , Hyderabad
Subject :NSO    Class : Class 2

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Gauri Singh from St Johns School Marhauli, Varanasi
Subject :NSO    Class : Class 7

Refer to the given Venn diagram and select the correct statements regarding animals X, Y and Z.

(i) Y can close its nostrils and remain underwater for long duration.
(ii) X possess glands under the eyes that help the body to get rid of excess salt.
(iii) Blubber is present under the skin of X and Z which protects them from cold.
(iv) X and Y are adapted to live in extremely cold climate of polar regions.
(v) Y live in groups and huddle together to keep themselves warm.
(vi) Z camouflage with the surrounding to avoid predators.

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


Ans 1:

aritroray from Chirec International School, Hyderabad
Class : Class 8

Ans 2:

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

Ans 3:

Prathamesh Raje from DPS Electronic City, Bangalore
Class : Class 8

Ans 4:

from Podar International School,Dhule, Dhule
Class : Class 8

Ans 5:

vartika from Phoenix world school, Pune
Class : Class 7

Ans 6:

Ankush Ghosh from DPS, Doha
Class : Class 8

Ans 7:

Akshara from NPS, Bengaluru
Class : Class 8

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Dhruv Sachdev from Bhavan Vidyalaya Junior, chandigarh
Subject :NSO    Class : Class 3

Ans 1:

Advika Narkar from Vibgyor High Airoli, Navi Mumbai
Class : Class 4
ccccc

Ans 2:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 4
c

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

S could be insects, so they can possess six legs. R can be birds, they possess only two legs. So, this statement is incorrect.


Ans 4:

Advika Narkar from Vibgyor High Airoli, Navi Mumbai
Class : Class 4
C

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Tanmay Mehta from Nirmala Convent high school, Renukoot
Subject :NSO    Class : Class 9

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KARTHI BALAJI from SBOA SCHOOL AND JUNIOR COLLEGE, CHENNAI
Subject :NSO    Class : Class 8

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Dushyant Singh from Shri Ram Centennial School, Indore
Subject :NSO    Class : Class 5

Ans 1:

UMANG from SPRING DALE COLLAGE, Lucknow
Class : Class 6
ANS IS 154

Ans 2:

from vels vidyashram, chennai
Class : Class 5

Ans 3:

from vels vidyashram, chennai
Class : Class 5

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Harsh Gupta from AECS Narora, Narora
Subject :NSO    Class : Class 9

Different substances are classified as :
I. Pure substance
II. Homogeneous mixture
III. Heterogeneous mixture
A few common substances are listed below.
(i) Air, (ii) Graphite, (iii) Gasoline, (iv) Diamond, (v) Tap water, (vi) Iron, (vii) Sodium chloride, (viii) Iodised salt, (ix) Brass, (x) Oil and water

Which of the following represents the correct classification of the given substances?
A I - (ii), (vi), (ix); II - (i), (v), (vii); III - (iii), (iv), (viii), (x)
B I - (ii), (iv), (vi), (vii); II - (i), (iii), (v), (viii), (ix); III - (x)
C I - (i), (iv), (vii), (ix); II - (ii), (v), (viii); III - (iii), (vi), (x)
D None of these represents the correct match.


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