National Science Olympiad Forum By SOF Olympiad Trainer

parijatsomani from The Global Edge School, Hyderabad

Subject :NSO Class : Class 7

When a horse pulls a cart, the force that helps the horse to move forward is the force exerted by ________.

(A) The cart on the horse

(B) The ground on the horse

(C) The ground on the cart

(D) The horse on the ground
can the options a , b, c be true . as for me I don't think the ground can be on top of an horse right (b) please could you tell the right answer

Ans 1:

Mayank Gupta from Kulachi Hansraj Model School, New Delhi

Class : Class 8

Ans 2:

kunal from Av vidya mandir school , cheeka

Class : Class 7

As ground apply frictional force on the horse. As it is not easy to run on rough area as compared to smooth area because smooth area apply less frictional force.

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kriet vohra from Presidium, Gurgaon

Subject :NSO Class : Class 5

Which sequence correctly lists the relative sizes from smallest to largest?

Aour solar system, Milky Way Galaxy, universe
Bour solar system, universe, Milky Way Galaxy
CMilky Way Galaxy, universe, our solar system
DMilky Way Galaxy, our solar system, universe

I gave the answer A but it shows D.request to check this question from NSO 3 Mock test of level 2

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Ans 1:

Gauri Chaturvedi from St. Joseph Convent, Jabalpur

Class : Class 6

Ans. A

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parijatsomani from The Global Edge School, Hyderabad

Subject :NSO Class : Class 7

Low atmospheric pressure exists on the earth in which of the following latitudes?

(A) At the equator only

(B) At 30° N and S

(C) At the poles

(D) At the equator and at 60° N and S.
as per me answer is d but computer is showing aplease check for the right answer

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is D.

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Desh Raj from Him Gurukul International School, HAMIRPUR

Subject :NSO Class : Class 8

The given diagram shows nitrogen cycle in the ecosystem. P, Q, R, S and T represent different chemical conversion steps in the cycle.

Which process (P - T) is correctly paired with the organismal group performing that step?
I. P Nitrobacter
II. Q Bacteria symbiotic with plants
III. R Denitrifying bacteria
IV. S Nitrifying bacteria
V. T Nitrogen fixing bacteria, such as Rhizobium or cyanobacteria

AIII, IV and V
BIV and V
CI, III and IV
DIII and IV

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is C.

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Daksh from RKC, Rajkot

Subject :NSO Class : Class 3

Select the odd one out based upon their life forms.

(A) Silkmoth

(B) Dragonfly

(C) Mosquitoes

(D) Housefly
Do not get this one.Please help.

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Ans 1:

Riddhiman Bose from Don Bosco School, Kolkata

Class : Class 5

Discuss on ForumQuestion.Select the odd one out based upon their life forms.(A) Silkmoth(B) Dragonfly(C) Mosquitoes(D) Housefly View All Answers (3)Ans 1:ishleenkaur from Maneckji Cooper Education Trust School, MumbaiClass : >Class 3 12 months agoThe answer is dragonfly because there is no pupae in the life cycle of dragonflyAns 2:SANDEEP JOSHI from ,Class : >Class 3 12 months agoSilkmoth can also flyAns 3:Riddhiman Bose from Don Bosco School, KolkataClass : >Class 3 3 minutes agoDiscuss on ForumQuestion.Select the odd one out based upon their life forms.(A) Silkmoth(B) Dragonfly(C) Mosquitoes(D) Housefly View All Answers (2)Ans 1:ishleenkaur from Maneckji Cooper Education Trust School, MumbaiClass : >Class 3 12 months agoThe answer is dragonfly because there is no pupae in the life cycle of dragonflyAns 2:SANDEEP JOSHI from ,Class : >Class 3 12 months agoSilkmoth can also flyDiscuss on ForumQuestion.Select the odd one out based upon their life forms.(A) Silkmoth(B) Dragonfly(C) Mosquitoes(D) Housefly View All Answers (3)Ans 1:ishleenkaur from Maneckji Cooper Education Trust School, MumbaiClass : >Class 3 12 months agoThe answer is dragonfly because there is no pupae in the life cycle of dragonflyAns 2:SANDEEP JOSHI from ,Class : >Class 3 12 months agoSilkmoth can also flyAns 3:Riddhiman Bose from Don Bosco School, KolkataClass : >Class 3 3 minutes agoDiscuss on ForumQuestion.Select the odd one out based upon their life forms.(A) Silkmoth(B) Dragonfly(C) Mosquitoes(D) Housefly View All Answers (2)Ans 1:ishleenkaur from Maneckji Cooper Education Trust School, MumbaiClass : >Class 3 12 months agoThe answer is dragonfly because there is no pupae in the life cycle of dragonflyAns 2:SANDEEP JOSHI from ,Class : >Class 3 12 months agoSilkmoth can also flyDiscuss on ForumQuestion.Select the odd one out based upon their life forms.(A) Silkmoth(B) Dragonfly(C) Mosquitoes(D) Housefly View All Answers (3)Ans 1:ishleenkaur from Maneckji Cooper Education Trust School, MumbaiClass : >Class 3 12 months agoThe answer is dragonfly because there is no pupae in the life cycle of dragonflyAns 2:SANDEEP JOSHI from ,Class : >Class 3 12 months agoSilkmoth can also flyAns 3:Riddhiman Bose from Don Bosco School, KolkataClass : >Class 3 3 minutes agoDiscuss on ForumQuestion.Select the odd one out based upon their life forms.(A) Silkmoth(B) Dragonfly(C) Mosquitoes(D) Housefly View All Answers (2)Ans 1:ishleenkaur from Maneckji Cooper Education Trust School, MumbaiClass : >Class 3 12 months agoThe answer is dragonfly because there is no pupae in the life cycle of dragonflyAns 2:SANDEEP JOSHI from ,Class : >Class 3 12 months agoSilkmoth can also flyWrite your commentsmy answer:D correct answer:

Ans 2:

ishleenkaur from Maneckji Cooper Education Trust School, Mumbai

Class : Class 3

The answer is dragonfly because there is no pupae in the life cycle of dragonfly

Ans 3:

SANDEEP JOSHI from ,

Class : Class 3

Silkmoth can also fly

Ans 4:

Riddhiman Bose from Don Bosco School, Kolkata

Class : Class 5

Discuss on ForumQuestion.Select the odd one out based upon their life forms.(A) Silkmoth(B) Dragonfly(C) Mosquitoes(D) Housefly View All Answers (2)Ans 1:ishleenkaur from Maneckji Cooper Education Trust School, MumbaiClass : >Class 3 12 months agoThe answer is dragonfly because there is no pupae in the life cycle of dragonflyAns 2:SANDEEP JOSHI from ,Class : >Class 3 12 months agoSilkmoth can also fly

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Desh Raj from Him Gurukul International School, HAMIRPUR

Subject :NSO Class : Class 8

Mirages form on hot days due to

Abeing dehydrated and seeing illusions
Bhot air rising from the ground
Csunlight being reflected off the ground
Dlight rays being bent

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is D.

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Shweta Galundia from witty international school, Udaipur

Subject :NSO Class : Class 6

Which of the following diagrams correctly shows the movement of the rack and pinion mechanism?

A
B
C
D

not knowing

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riteshnayak from DAV PUBLIC SCHOOL ,MCL,KALINGA AREA, TALCHER

Subject :NSO Class : Class 4

Which of these is INCORRECT about roughage?

A It helps in making blood.
B It helps in repairing the damaged parts of the body.
C It helps the body to get rid of undigested food.
D Both a and b

WHAT IS THE ANSWER

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Ans 1:

SOUMI PAL from DELHI PUBLIC SCHOOL, DURG

Class : Class 6

The right answer is d.

Ans 2: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is D.

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Gauri Chaturvedi from St. Joseph Convent, Jabalpur

Subject :NSO Class : Class 5

Consider the following statements regarding silk moth.
I.The female silk moth lays eggs which hatch into pupa.
II.The caterpillar secretes a fibre made of a protein, which hardens on exposure to air.
III.The silk fibre is obtained from the cocoon of the moth.
IV.The caterpillar covers itself by silk fibres and enters the adult stage. Among the given statements,

Aonly I is correct
Bonly II is correct
Cboth I and IV are correct
Dboth II and III are correct

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Gauri Chaturvedi from St. Joseph Convent, Jabalpur

Subject :NSO Class : Class 5

Which of the following statements regarding weathering is not correct?

AHeat and heavy rainfall increase the rate of weathering.
BRocks of different compositions weather at different rates.
CThe longer a rock is exposed at the surface, the more weathered it will be.
DThe presence of soil increases the rate of weathering in the underlying bedrock.

Please tell the answer

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