National Science Olympiad Forum By SOF Olympiad Trainer - Page 440

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 6
B . (2.1cm)

Ans 2:

Class : Class 6
B . (2.1cm)

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
As said in the solution no repeating of same pairs (AB and BA) so 15 is correct.

Ans 2:

Class : Class 4
no repetition of same pairs ( like AB and BA )

Ans 3:

Class : Class 7
A 30

Ans 4:

Class : Class 8
Vighneshwar , Bhavya and Anika can you tell me how the answer is A ??? Why are you telling the wrong answer ???

Ans 5:

Class : Class 7
A 30

Ans 6:

Class : Class 7
AAAAAAAAAAAAAAAAAAAAAAA = Answer

Ans 7:

Class : Class 6

Ans 8:

Class : Class 6

Ans 9:

Class : Class 4
Answer is A

Ans 10:

Class : Class 4
Answer should be A as 6 x 5 =30

Ans 11:

Class : Class 5
a

Ans 12:

Class : Class 8
The correct answer is C

Ans 13:

Class : Class 8
C 15

Ans 14:

Class : Class 4

Ans 15:

Class : Class 5
A

Ans 16:

Class : Class 4
the solution is correct as this is not combination this is just simple paring that is converted to handshakes . answer is C

Ans 17:

Class : Class 7
the correct answer is D

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7
D

Ans 2:

Class : Class 4
the correct ans is D

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Subject :NSO    Class : Class 8

In which of the following agricultural setups, the nutrient needs of one crop are fulfilled by the other crop?


A
B
C
D


here,groundnut soyabeans and wheat all are legumes which have nodules at their roots for rhizobium bacteria, which fixes atmospheric N2 --->nitrates.so, only rice crop's requiremnts need to be fulffilled by any of the other crops.So,the correct diagram must show rice and any one other crop(because the question reads "other crop" not crops)So ideally,D should be the correct option. How is C right boggles me.

Ans 1:

Class : Class 4
It should be a

Ans 2:

Class : Class 8
please explain

Ans 3:

Class : Class 6
answer should be a

Ans 4:

Class : Class 8

Ans 5:

Class : Class 8

Ans 6:

Class : Class 8

Ans 7:

Class : Class 8
Can you explain how it is working

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Subject :NSO    Class : Class 6

Read the following statements (i) - (v), each with one or two blanks.

(i) (A) have liquid skeletons.
(ii) The last (B) pairs of ribcage bones that are not joined to the breast bone are called (C).
(iii) The longest bone of human body is (D).
(iv) (E) is strong, flexible band that holds bones together at the joints.
(v) (F) is a smooth elastic tissue that covers and protects the ends of long bones at the joints.
Which of the following options correctly fills any two of these blanks?

A (A)-Earthworm, (D)-Humerus
B (E)-Ligament, (f)-Cartilage
C (B)-Four, (C)-Floating ribs
D (E)-Tendon, (f)-Ligament


B

Ans 1:

Class : Class 10
The correct answer is option B . Clearly , the ligaments hold the bones together at joints and cartilage acts as a cushion that acts as a shock absorbent .

Ans 2:

Class : Class 10

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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:

Class : Class 7
P-(iii),Q-(v),R-(vi)

Ans 2:

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 3:

Class : Class 9
Big ears will have a comparatively more blood supply. So it will have more heat loss also.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
Option A is the correct option.

Ans 2:

Class : Class 7
The answer is option A, I think

Ans 3:

Class : Class 8
A OPTION

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
answer is B

Ans 2:

Class : Class 8
Answer is B

Ans 3:

Class : Class 7

Ans 4:

Class : Class 10

Ans 5:

Class : Class 3

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