National Science Olympiad Forum By SOF Olympiad Trainer

Kaustav Pramanik from Indus Valley World School, Kolkata, Kolkata

Subject :NSO Class : Class 3

Study the given graph carefully. What is the aim of the experiment?

A To see if water is needed for plant growth.
B To see if different amount of water affect the growth of seedlings.
C To prove that plants grow taller over time.
D To show that water is needed for germination of seeds.

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

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Adhvith U.B from R.N.S. Vidyaniketan , Bengaluru

Subject :NSO Class : Class 8

Which of the following statements holds true about the kind of fertilization as shown in the given figure?

A The female lays hundreds of gametes.
B The female gametes are laid directly on cluster of floating male gametes.
C The male gametes are immobile whereas female gametes can swim in water with the help of long tail.
D Zygote receives chromosomes unequally from the parents, depending upon the number of gametes present in water.

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Ans 1:

mohsin khan from oasis english school, Parbhani

Class : Class 8

A

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NAIRIT SHAH from p.g.garodia school, mumbai

Subject :NSO Class : Class 4

Take a few naphthalene balls, place them in a corner of your classroom and observe them after 4-5 days. The size of the balls have reduced due to ________.

A Melting
B Evaporation
C Sublimation
D Transpiration

Why sublimation is correct?

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

Well, sublimation is the process of a solid directly converting into gas. In this case, the process of sublimation happens which is the reason behind the reduction in size of the balls.

Ans 2: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

Well, sublimation is the process of a solid directly converting into gas. In this case, the process of sublimation happens which is the reason behind the reduction in size of the balls.

Ans 3: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

Well, sublimation is the process of a solid directly converting into gas. In this case, the process of sublimation happens which is the reason behind the reduction in size of the balls.

Ans 4: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

Well, sublimation is the process of a solid directly converting into gas. In this case, the process of sublimation happens which is the reason behind the reduction in size of the balls.

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ARCHIT PATIL from KASHINATH PALOD PUBLIC SCHOOL JALGAON, Jalgaon

Subject :NSO Class : Class 5

Megha does not have dimples in her cheeks whereas her mother has. Her maternal cousin, however, has similar set of dimples. This is due to

(A) Dominant trait

(B) Recessive trait

(C) Learned trait

(D) Behavioural trait

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Nitin Agarwal from Carmel Convent Sr. Sec. School, Gwalior

Subject :NSO Class : Class 5

Study the given figures of a lunar cycle. When is New Moon most likely expected for given lunar cycle?

ANovember 10
BNovember 12
CNovember 8
DNovember 6

please explain this question

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Ans 1:

sai ramakrishna GUDIMETLA from AMM MATRICULATION HIGHER SECONDARY SCHOOL, Chennai

Class : Class 5

Ans 2:

laljikundu2013@gmail.com from COSSIPORE KENDRIYA VODYALAYA, Kolkata

Class : Class 5

D

Ans 3:

kpks14 from RIMT World School, Chandigarh

Class : Class 7

D is the correct answer.

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SUSHANT TYAGI from ,

Subject :NSO Class : Class 5

Ritika performed an experiment as mentioned below: Four different types of seeds were planted in identical pots filled with the same kind and amount of soil. The pots were placed in a warm, sunny place and were given the same amount of water each day for a month. Which question about these seeds could be answered at the end of the month?

AWhich seeds grew well in the dark?
BWhich seeds produced the tallest plants?
CWhich seeds survived in cold temperatures?
DWhich seeds needed the least amount of water?

please answer this

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Ans 1:

Shriya Sreekrishna from BLUEBELLS SCHOOL INTERNATIONAL, New Delhi

Class : Class 7

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AtishayKochar from DPS DUBAI, Dubai

Subject :NSO Class : Class 3

What fraction of the figure is shaded ?

(A)

(B)

(C)

(D)

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Ans 1:

RIDHIMA AGARWAL from dps noida, Noida

Class : Class 4

4/8

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Amar from AJ School, Navi Mumbai, Mumbai

Subject :NSO Class : Class 6

A typical flower has a stalk called P. The uppermost part of stalk is wider and is known as Q. On the top of Q different whorls are present. The outermost whorl consists of green leaf-like structures called R. The inner whorl consists of S which are brightly coloured and scented.
What are P, Q, R and S ?
P-----Q-----R-----S
(a) Thalamus-----Pedicel-----Petals-----Sepals
(b) Pedicel-----Thalamus-----Petals-----Sepals
(c) Pedicel-----Thalamus-----Sepals-----Petals
(d) Thalamus-----Pedicel-----Sepals-----Petals

good

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Dhwani Bamo from BGS International Public School, New Delhi

Subject :NSO Class : Class 5

Manomay conducted an experiment where 4 identical metal balls were allowed to roll down 4 similar curves with surfaces of different texture. The time taken for the ball to come to a complete stop for each of the different surfaces was recorded in the table below.

Which curve has the roughest surface?

A P
B Q
C R
D S