National Science Olympiad Forum By SOF Olympiad Trainer

TUSHAR KUMAR from AIR FORCE BAL BHARTI SCHOOL, DELHI

Subject :NSO Class : Class 9

A piece of chalk can be broken into small particles by hammering but a piece of iron cannot be broken into smaller particles by hammering. It illustrates that

A Particles of matter have space in between them
B Particles of matter possess kinetic energy
C Particles of matter attract one another
D All of these.

please tell me the answer

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Ans 1:

Dhruvan G from Indian School al Ghubra, Muscat

Class : Class 9

It is (C)

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Audhira from vydehi school of excellence, bangalore

Subject :NSO Class : Class 2

How is a young plant different from an adult plant?

A The adult plant has roots but the young plant does not.
B The adult plant has a stem but the young plant does not.
C The adult plant has flowers but the young plant does not.
D The adult plant does not need air but the young plant does.

please tell how

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Ans 1:

Gaurika Bhasin from Genesis global school, Noida

Class : Class 2

The correct answer is C

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Aarya Teja Kapu from Bharatiya Vidya Bhavan Public School, Hyderabad

Subject :NSO Class : Class 6

A simple pendulum oscillates between point P and Q as shown in figure and its time period is T. If time taken to go from R to Q is t, which of the following relation is correct?

(A) t = T

(B)

(C)

(D)

How can it be C???

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Ans 1:

Gyanesh from K.V. NO.1 SEC-30 GANDHINAGAR, GANDHINAGAR

Class : Class 3

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Varoon Garg from Nalanda International School, Haryana

Subject :NSO Class : Class 7

Why the symbol of pound is lb

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nishka Alpesh Lad from U S Ostwal English Academy, Mumbai

Subject :NSO Class : Class 7

Thermometers are used to measure the temprature. Thermometer senses the temprature by which one of the following liquid? A. Sulphur based fluid B. Potassium based fluid C. Hydrocarbon based fluid D. None of these

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Dhruvan G from Indian School al Ghubra, Muscat

Subject :NSO Class : Class 9

Which of the following is not correct?

A If we drop a 10 lb iron ball and 1 lb aluminium ball from the top of a high platform inside a mine, then both will reach the floor at the same time.
B The gravitational force of attraction between the two bodies increases when their masses are increased and distance is reduced.
C We do not observe small objects moving towards each other because frictional force balances the gravitational pull.
D When a body is thrown up, the acceleration due to gravity at the topmost point is zero because velocity of the body is zero.

Shouldn't it be C

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Ans 1:

Tanmay Mehta from Nirmala Convent high school, Renukoot

Class : Class 9

the right answer is C.

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Nipun Abhilash from National Public School, Banashankhari, Bangalore

Subject :NSO Class : Class 8

A block of mass 10 kg is suspended through two light spring balances as shown in figure. Then

A Both the scales will read 10 kg
B Both the scales will read 5 kg
C The upper scale will read 10 kg and the lower scale zero
D The reading may be anything but their sum will be 10 kg.

bottom 10kg

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Ans 1:

Bipasana from KV IIT Kanpur, Kanpur

Class : Class 9

There's an error in the question

Ans 2:

AARAV AGRAWAL from BIRLA DIVYA JYOTI, SILIGURI

Class : Class 8

Neglect the mass of spring balance..it is written in question

Ans 3:

Nipun Abhilash from National Public School, Banashankhari, Bangalore

Class : Class 9

Correct answer not available upper scale will show weight of bottom scale as well

Ans 4:

Nipun Abhilash from National Public School, Banashankhari, Bangalore

Class : Class 9

upper 10 kg plus weight of bottom scale

Ans 5:

Arnav Raj Sharma from Dpsvk, Gurgaon

Class : Class 9

I don't think there is a correct answer because the force exerted by the upper spring balance will resist the reading on the lower balance for the Object

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Agastya from NCS Arakkonam, Chennai

Subject :NSO Class : Class 7

The figure shows an instrument which is used to measure _________.

A Earthquake
B Rainfall
C Wind speed
D Relative humidity

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Ans 1:

nishka Alpesh Lad from U S Ostwal English Academy, Mumbai

Class : Class 7

B. Rainfall

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Avaneesh Sai Vemparala from The knowledge habitat, Pune

Subject :NSO Class : Class 8

what is the melting point of blood

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Agastya from NCS Arakkonam, Chennai

Subject :NSO Class : Class 7

Raghu used excessive chemical fertilisers in his field while Raman found the soil of his field to be basic in nature. What should they add to their fields to improve the quality of the soil?

A Raghu : Organic matter Raman : Quick lime
B Raghu : Quick lime Raman : Organic matter
C Both should add quick lime.
D Both should add organic matter.

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Ans 1:

Sourasis kundu from St.agnes higher secondary School, Kharagpur

Class : Class 6

Ans 2:

Sourasis kundu from St.agnes higher secondary School, Kharagpur

Class : Class 6

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