National Science Olympiad Forum By SOF Olympiad Trainer

ansh from deens academy, Bengaluru

Subject :NSO Class : Class 4

The bird shown in the figure lays its eggs in

(A) Its own nest

(B) Barbet's nest

(C) Tailor bird's nest

(D) Crow's nest.

Ans 1:

Agnimitra Gupta from south point school, Kolkata

Class : Class 6

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ansh from deens academy, Bengaluru

Subject :NSO Class : Class 4

In which of the following animals, ears are not seen?

(A) Cat

(B) Elephant

(C) Giraffe

(D) Frog.

Ans 1:

Rishika Maurya from Dps, Vadodara

Class : Class 7

frog

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SpaceXX from indian school sohar, Muscat

Subject :NSO Class : Class 4

Which of the following statements is incorrect?

AA wedge is made up of two inclined planes.
BA fork is considered a screw.
CDoor knob is an example of wheel and axle.
DScrews are used to lower and raise things.

d is the correct answer please check if the answer is wrong

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Ans 1:

Arnav kaul from Chirec, Hyderabad

Class : Class 2

Seems like b but giving c how?

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Navneeth Reejish from Yuvabharati International school, Singapore

Subject :NSO Class : Class 4

Preeti put her hand above the flame of the candle. She could not hold her hand above the flame for more than few seconds. Whereas, when she brought her hands close to the sides of the flame, she felt the warmth of the flame and held her hands in that position for a longer time. Which of the following justifies this?

AThe candle flame always burns downwards.
BThe candle flame always burns upwards.
CThe hot air rises up.
DThe hot air spreads in all directions

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Ans 1:

Karan Chavan from GIIS,Chinchwad, Pune

Class : Class 5

c) The hot air rises up is the answer

Ans 2:

Malay Mayank from Air force school bareilly , Samastipur

Class : Class 6

The hot air rises up

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Navneeth Reejish from Yuvabharati International school, Singapore

Subject :NSO Class : Class 4

★ The given diagram shows two girls playing table tennis. Amrita hit the ball over the net and at point X, Beena hit it back with a lot of force.What would happen at point X?

(A) The force caused the ball to stop moving.
(B) The force caused a change in the size of the ball.
(C) The force caused a change in the direction of the ball.

Aa and b
Ba only
Ca, b and c
Dc only

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is D.

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Navneeth Reejish from Yuvabharati International school, Singapore

Subject :NSO Class : Class 4

Manish tried to see if he could produce different sounds with a guitar. The table below shows some of the things he did and the result.

What did Manish's experiment show about how sound can be produced ?

AThe same sounds can be produced in different ways.
BDifferent sounds can be produced by doing the same actions.
CDifferent sounds can be produced by doing different actions.
DNone of the above.

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is C.

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Navneeth Reejish from Yuvabharati International school, Singapore

Subject :NSO Class : Class 4

The 'X' in the figure below shows a _____________ moon.

(A) Full

(B) Gibbous

(C) Crescent

(D) New.

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

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MANASVI BHAKUNI from BAL BHARATI PUBLIC SCHOOL, DWARKA, NEW DELHI

Subject :NSO Class : Class 4

Which of the following figures shows of the figure is shaded ?

(A)

(B)

(C)

(D)

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

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Rishab Murthy from Birla Public School , Doha

Subject :NSO Class : Class 4

★ Clothes last longer if they are cleaned properly when they get dirty. Which of the following is not the right way to clean clothes?

AFresh ink stains on clothes can be removed with talcum powder.
BOil and grease stains on clothes can be removed with petrol.
CSilk clothes and woollen clothes should be washed with strong detergent.
DAll of the above

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Ans 1:

Rudraksh Tiwari from Kumaon Public School Dwarahat, Almora

Class : Class 7

c

Ans 2:

Agnimitra Gupta from south point school, Kolkata

Class : Class 6

please explain

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Apoorva from Centre point school Katol Road, Nagpur

Subject :NSO Class : Class 4

Which of these will take the least time to get dry?

ASilk saree
BJeans
CCotton handkerchief
DWoollen skirt

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Ans 1:

Biradar Mahendra from Jai Hind Public school Udgir , Udgir

Class : Class 4

I think A

Ans 2:

Ch . Mahanth Isaac Charles Finny from Smaler Scholars, SPSR Nellore

Class : Class 4

HI, I AM MIC FINNY from 4th class. silk saree , jean sand woollen skirt take the most time to dry. cotton handkerchief drys faster so answer is cotton hand kercheif. thank you.BYE.

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